| 402 | Añapero Boreal | Chordeiles minor | Common Nighthawk | Caprimulgidae | Caprimulgiformes | Fichado |
| 409 | Añapero Castaño | Lurocalis semitorquatus | Short-tailed Nighthawk | Caprimulgidae | Caprimulgiformes | Fichado |
| 403 | Añapero Chico | Chordeiles pusillus | Least Nighthawk | Caprimulgidae | Caprimulgiformes | Fichado |
| 921 | Afrechero Plomizo | Haplospiza unicolor | Uniform Finch | Emberizidae | Passeriformes | SinFicha |
| 290 | Agachona Chica | Thinocorus rumicivorus | Least Seedsnipe | Thinocoridae | Charadriiformes | SinFicha |
| 291 | Agachona de Collar | Thinocorus orbignyianus | Gray-breasted Seedsnipe | Thinocoridae | Charadriiformes | SinFicha |
| 293 | Agachona Grande | Attagis gayi | Rufous-bellied Seedsnipe | Thinocoridae | Charadriiformes | SinFicha |
| 292 | Agachona Patagónica | Attagis malouinus | White-bellied Seedsnipe | Thinocoridae | Charadriiformes | SinFicha |
| 247 | Aguatero | Nycticryphes semicollaris | South American Painted-Snipe | Rostratulidae | Charadriiformes | SinFicha |
| 187 | Aguila Coronada | Harpyhaliaetus coronatus | Crowned Eagle | Accipitridae | Falconiformes | SinFicha |
| 189 | Aguila Crestuda Negra | Spizaetus tyrannus | Black Hawk-Eagle | Accipitridae | Falconiformes | SinFicha |
| 190 | Aguila Crestuda Real | Spizaetus ornatus | Ornate Hawk-Eagle | Accipitridae | Falconiformes | SinFicha |
| 192 | Aguila Monera | Morphnus guianensis | Crested Eagle | Accipitridae | Falconiformes | SinFicha |
| 153 | Aguila Mora | Geranoaetus melanoleucus | Black-chested Buzzard-Eagle | Accipitridae | Falconiformes | SinFicha |
| 160 | Aguila Negra | Buteogallus urubitinga | Great Black-Hawk | Accipitridae | Falconiformes | SinFicha |
| 186 | Aguila Pescadora | Pandion haliaetus | Osprey | Accipitridae | Falconiformes | SinFicha |
| 193 | Aguila Poma | Oroaetus isidori | Black-and-chestnut Eagle | Accipitridae | Falconiformes | SinFicha |
| 188 | Aguila Solitaria | Harpyhaliaetus solitarius | Solitary Eagle | Accipitridae | Falconiformes | SinFicha |
| 154 | Aguila Viuda | Spizastur melanoleucus | Black-and-white Hawk-Eagle | Accipitridae | Falconiformes | SinFicha |
| 176 | Aguilucho Alas Largas | Buteo albicaudatus | White-tailed Hawk | Accipitridae | Falconiformes | SinFicha |
| 181 | Aguilucho Andino | Buteo albigula | White-throated Hawk | Accipitridae | Falconiformes | SinFicha |
| 155 | Aguilucho Blanco | Leucopternis polionota | Mantled Hawk | Accipitridae | Falconiformes | SinFicha |
| 182 | Aguilucho Cola Corta | Buteo brachyurus | Short-tailed Hawk | Accipitridae | Falconiformes | SinFicha |
| 180 | Aguilucho Cola Rojiza | Buteo ventralis | Rufous-tailed Hawk | Accipitridae | Falconiformes | SinFicha |
| 185 | Aguilucho Colorado | Heterospizias meridionalis | Savanna Hawk | Accipitridae | Falconiformes | SinFicha |
| 178 | Aguilucho Común | Buteo polyosoma | Red-backed Hawk | Accipitridae | Falconiformes | SinFicha |
| 167 | Aguilucho Gris | Asturina nitida | Gray Hawk | Accipitridae | Falconiformes | SinFicha |
| 177 | Aguilucho Langostero | Buteo swainsoni | Swainson's Hawk | Accipitridae | Falconiformes | SinFicha |
| 184 | Aguilucho Pampa | Busarellus nigricollis | Black-collared Hawk | Accipitridae | Falconiformes | SinFicha |
| 179 | Aguilucho Puneño | Buteo poecilochrous | Puna Hawk | Accipitridae | Falconiformes | SinFicha |
| 34 | Albatros Cabeza Gris | Diomedea chrysostoma | Grey-headed Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 36 | Albatros Ceja Negra | Diomedea melanophrys | Black-browed Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 37 | Albatros Corona Blanca | Diomedea cauta | Shy Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 32 | Albatros Errante | Diomedea exulans | Wandering Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 38 | Albatros Oscuro | Phoebetria fusca | Sooty Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 35 | Albatros Pico Fino | Diomedea chlororhynchos | Yellow-nosed Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 33 | Albatros Real | Diomedea epomophora | Royal Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 39 | Albratros Manto Claro | Phoebetria palpebrata | Light-mantled Albatross | Diomedeidae | Procellariiformes | SinFicha |
| 390 | Alicuco Grande | Otus atricapillus | Variable Screech-Owl | Strigidae | Strigiformes | SinFicha |
| 389 | Alicucu Común | Otus choliba | Tropical Screech-Owl | Strigidae | Strigiformes | SinFicha |
| 638 | Anambé Castaño | Pachyramphus castaneus | Chestnut-crowned Becard | Tyrannidae | Passeriformes | SinFicha |
| 637 | Anambé Común | Pachyramphus polychopterus | White-winged Becard | Tyrannidae | Passeriformes | SinFicha |
| 636 | Anambé Grande | Pachyramphus validus | Crested Becard | Tyrannidae | Passeriformes | SinFicha |
| 639 | Anambé Verdoso | Pachyramphus viridis | Green-backed Becard | Tyrannidae | Passeriformes | SinFicha |
| 374 | Anó Chico | Crotophaga ani | Smooth-billed Ani | Cuculidae | Cuculiformes | SinFicha |
| 376 | Anó Grande | Crotophaga major | Greater Ani | Cuculidae | Cuculiformes | SinFicha |
| 375 | Anó Pico Surcado | Crotophaga sulcirostris | Groove-billed Ani | Cuculidae | Cuculiformes | SinFicha |
| 786 | Angú | Donacobius atricapillus | Black-capped Mockingthrush | Troglodytidae | Passeriformes | SinFicha |
| 72 | Aninga | Anhinga anhinga | Anhinga | Anhingidae | Pelecaniformes | SinFicha |
| 823 | Arañero Ceja Amarilla | Basileuterus signatus | Pale-legged Warbler | Parulidae | Passeriformes | SinFicha |
| 825 | Arañero Corona Rojiza | Myioborus brunniceps | Brown-capped Redstart | Parulidae | Passeriformes | SinFicha |
| 821 | Arañero Coronado Chico | Basileuterus culicivorus | Golden-crowned Warbler | Parulidae | Passeriformes | SinFicha |
| 822 | Arañero Coronado Grande | Basileuterus bivittatus | Two-banded Warbler | Parulidae | Passeriformes | SinFicha |
| 818 | Arañero Estriado | Dendroica striata | Blackpoll Warbler | Parulidae | Passeriformes | SinFicha |
| 824 | Arañero pico corto | Basileuterus flaveolus | Flavescent Warbler | Parulidae | Passeriformes | SinFicha |
| 820 | Arañero Ribereño | Basileuterus rivularis | Neotropical River Warbler | Parulidae | Passeriformes | SinFicha |
| 819 | Arañero Silbón | Basileuterus leucoblepharus | White-rimmed Warbler | Parulidae | Passeriformes | SinFicha |
| 511 | Arapasú | Dendrocincla fuliginosa | Plain-brown Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 463 | Arasarí Banana | Baillonius bailloni | Saffron Toucanet | Ramphastidae | Piciformes | SinFicha |
| 462 | Arasarí Chico | Selenidera maculirostris | Spot-billed Toucanet | Ramphastidae | Piciformes | SinFicha |
| 464 | Arasarí Fajado | Pteroglossus castanotis | Chestnut-eared Aracari | Ramphastidae | Piciformes | SinFicha |
| 408 | Atajacaminos Ala Negra | Eleothreptus anomalus | Sickle-winged Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 406 | Atajacaminos Ñañarca | Caprimulgus longirostris | Band-winged Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 407 | Atajacaminos Chico | Caprimulgus parvulus | Little Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 404 | Atajacaminos Colorado | Caprimulgus rufus | Rufous Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 414 | Atajacaminos Coludo | Macropsalis creagra | Long-trained Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 415 | Atajacaminos Lira | Uropsalis lyra | Lyre-tailed Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 411 | Atajacaminos Ocelado | Nyctiphrynus ocellatus | Ocellated Poorwill | Caprimulgidae | Caprimulgiformes | SinFicha |
| 405 | Atajacaminos Oscuro | Caprimulgus sericocaudatus | Silky-tailed Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 413 | Atajacaminos Tijera | Hydropsalis brasiliana | Scissor-tailed Nightjar | Caprimulgidae | Caprimulgiformes | SinFicha |
| 314 | Atí | Phaetusa simplex | Large-billed Tern | Sternidae | Charadriiformes | SinFicha |
| 73 | Ave Fragata | Fregata magnificens | Magnificent Frigatebird | Fregatidae | Pelecaniformes | SinFicha |
| 251 | Avoceta Andina | Recurvirostra andina | Andean Avocet | Recurvirostridae | Charadriiformes | SinFicha |
| 412 | Ñacundá | Podager nacunda | Nacunda Nighthawk | Caprimulgidae | Caprimulgiformes | SinFicha |
| 383 | Ñacurutú | Bubo virginianus | Great Horned Owl | Strigidae | Strigiformes | SinFicha |
| 354 | Ñanday | Nandayus nenday | Nanday Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 9 | Ñandú | Rhea americana | Greater Rhea | Rheidae | Struthioniformes | SinFicha |
| 632 | Bailarín Azul | Chiroxiphia caudata | Blue Manakin | Pipridae | Passeriformes | SinFicha |
| 631 | Bailarín Blanco | Manacus manacus | White-bearded Manakin | Pipridae | Passeriformes | SinFicha |
| 633 | Bailarín Naranja | Pipra fasciicauda | Band-tailed Manakin | Pipridae | Passeriformes | SinFicha |
| 635 | Bailarín Oliváceo | Schiffornis virescens | Greenish Schiffornis | Pipridae | Passeriformes | SinFicha |
| 634 | Bailarín Verde | Piprites chloris | Wing-barred Piprites | Pipridae | Passeriformes | SinFicha |
| 100 | Bandurria Austral | Theristicus melanopis | Black-faced Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 99 | Bandurria Boreal | Theristicus caudatus | Buff-necked Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 98 | Bandurria Mora | Harpiprion caerulescens | Plumbeous Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 519 | Bandurrita Andina | Upucerthia validirostris | Buff-breasted Earthcreeper | Furnaridae | Passeriformes | SinFicha |
| 521 | Bandurrita Chaqueña | Upucerthia certhioides | Chaco Earthcreeper | Furnaridae | Passeriformes | SinFicha |
| 522 | Bandurrita Cola Castaña | Upucerthia andeacola | Rock Earthcreeper | Furnaridae | Passeriformes | SinFicha |
| 520 | Bandurrita Común | Upucerthia dumetaria | Scale-throated Earthcreeper | Furnaridae | Passeriformes | SinFicha |
| 524 | Bandurrita Patagónica | Eremobius phoenicurus | Band-tailed Earthcreeper | Furnaridae | Passeriformes | SinFicha |
| 523 | Bandurrita Pico Recto | Upucerthia ruficauda | Straight-billed Earthcreeper | Furnaridae | Passeriformes | SinFicha |
| 731 | Barullero | Euscarthmus meloryphus | Tawny-crowned Pygmy-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 593 | Batará Copetón | Mackenziana severa | Tufted Antshrike | Formicariidae | Passeriformes | SinFicha |
| 601 | Batará Estriado | Myrmorchilus strigilatus | Stripe-backed Antbird | Formicariidae | Passeriformes | SinFicha |
| 591 | Batará Gigante | Batara cinerea | Giant Antshrike | Formicariidae | Passeriformes | SinFicha |
| 594 | Batará Goteado | Hypoedaleus guttatus | Spot-backed Antshrike | Formicariidae | Passeriformes | SinFicha |
| 599 | Batará Negro | Pyriglena leucoptera | White-shouldered Fire-eye | Formicariidae | Passeriformes | SinFicha |
| 600 | Batará Pecho Negro | Biatas nigropectus | White-bearded Antshrike | Formicariidae | Passeriformes | SinFicha |
| 592 | Batará Pintado | Mackenziana leachii | Large-tailed Antshrike | Formicariidae | Passeriformes | SinFicha |
| 281 | Batitú | Bartramia longicauda | Upland Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 279 | Becasa de Mar | Limosa haemastica | Hudsonian Godwit | Scolopacidae | Charadriiformes | SinFicha |
| 285 | Becasina Andina | Gallinago andina | Puna Snipe | Scolopacidae | Charadriiformes | SinFicha |
| 282 | Becasina Boreal | Limnodromus scolopaceus | Long-billed Dowitcher | Scolopacidae | Charadriiformes | SinFicha |
| 284 | Becasina Común | Gallinago gallinago | Common Snipe | Scolopacidae | Charadriiformes | SinFicha |
| 283 | Becasina Grande | Gallinago stricklandii | Fuegian Snipe | Scolopacidae | Charadriiformes | SinFicha |
| 694 | Benteveo Chico | Conopias trivirgata | Three-striped Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 691 | Benteveo Común | Pitangus sulphuratus | Great Kiskadee | Tyrannidae | Passeriformes | SinFicha |
| 693 | Benteveo Mediano | Myiozetetes similis | Social Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 682 | Benteveo Rayado | Myiodynastes maculatus | Streaked Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 74 | Biguá Común | Phalacrocorax olivaceus | Neotropic Cormorant | Phalacrocoracidae | Pelecaniformes | SinFicha |
| 717 | Birro Chico | Pyrrhomyias cinnamomea | Cinnamon Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 716 | Birro Común | Hirundinea ferruginea | Cliff Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 715 | Birro Grande | Myiotheretes striaticollis | Streak-throated Bush-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 656 | Birro Gris | Polioxolmis rufipennis | Rufous-webbed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 956 | Boyerito | Icterus cayanensis | Epaulet Oriole | Icteridae | Passeriformes | SinFicha |
| 950 | Boyero Ala Amarilla | Cacicus chrysopterus | Golden-winged Cacique | Icteridae | Passeriformes | SinFicha |
| 951 | Boyero Cacique | Cacicus haemorrhous | Red-rumped Cacique | Icteridae | Passeriformes | SinFicha |
| 952 | Boyero Negro | Cacicus solitarius | Solitary Cacique | Icteridae | Passeriformes | SinFicha |
| 925 | Brasita de Fuego | Coryphospingus cucullatus | Red-crested Finch | Emberizidae | Passeriformes | SinFicha |
| 461 | Burgo | Momotus momota | Blue-crowned Motmot | Momotidae | Coraciiformes | SinFicha |
| 701 | Burlisto Cabeza Gris | Attila phoenicurus | Rufous-tailed Attila | Tyrannidae | Passeriformes | SinFicha |
| 702 | Burlisto Castaño | Casiornis rufa | Rufous Casiornis | Tyrannidae | Passeriformes | SinFicha |
| 708 | Burlisto Chico | Contopus cinereus | Tropical Pewee | Tyrannidae | Passeriformes | SinFicha |
| 703 | Burlisto Cola Castaña | Myiarchus tyrannulus | Brown-crested Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 706 | Burlisto Corona Negra | Myiarchus tuberculifer | Dusky-capped Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 704 | Burlisto Pico Canela | Myiarchus swainsoni | Swainson's Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 705 | Burlisto Pico Negro | Myiarchus ferox | Short-crested Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 231 | Burrito Amarillo | Porzana flaviventer | Yellow-breasted Crake | Rallidae | Gruiformes | SinFicha |
| 228 | Burrito Colorado | Laterallus leucopyrrhus | Red-and-white Crake | Rallidae | Gruiformes | SinFicha |
| 227 | Burrito Común | Laterallus melanophaius | Rufous-sided Crake | Rallidae | Gruiformes | SinFicha |
| 225 | Burrito Cuyano | Laterallus jamaicensis | Black Rail | Rallidae | Gruiformes | SinFicha |
| 232 | Burrito Enano | Coturnicops notatus | Speckled Rail | Rallidae | Gruiformes | SinFicha |
| 229 | Burrito Grande | Porzana albicollis | Ash-throated Crake | Rallidae | Gruiformes | SinFicha |
| 226 | Burrito Negruzco | Laterallus spilopterus | Black Rail | Rallidae | Gruiformes | SinFicha |
| 230 | Burrito Pico Rojo | Porzana erythrops | Paint-billed Crake | Rallidae | Gruiformes | SinFicha |
| 707 | Buslisto Copetón | Contopus fumigatus | Smoke-colored Pewee | Tyrannidae | Passeriformes | SinFicha |
| 943 | Cabecitanegra Andino | Carduelis uropygialis | Yellow-rumped Siskin | Fringillidae | Passeriformes | SinFicha |
| 946 | Cabecitanegra Austral | Carduelis barbata | Black-chinned Siskin | Fringillidae | Passeriformes | SinFicha |
| 944 | Cabecitanegra Común | Carduelis magellanica | Hooded Siskin | Fringillidae | Passeriformes | SinFicha |
| 945 | Cabecitanegra Picudo | Carduelis crassirostris | Thick-billed Siskin | Fringillidae | Passeriformes | SinFicha |
| 392 | Caburé Chico | Glaucidium brasilianum | Ferruginous Pygmy-Owl | Strigidae | Strigiformes | SinFicha |
| 391 | Caburé Grande | Glaucidium nanum | Austral Pygmy-Owl | Strigidae | Strigiformes | SinFicha |
| 393 | Caburé Yungueño | Glaucidium jardinii | Andean Pygmy-Owl | Strigidae | Strigiformes | SinFicha |
| 355 | Cachaña | Enicognathus ferrugineus | Austral Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 938 | Cachilo Canela | Donacospiza albifrons | Long-tailed Reed-Finch | Emberizidae | Passeriformes | SinFicha |
| 928 | Cachilo Ceja Amarilla | Ammodramus humeralis | Grassland Sparrow | Emberizidae | Passeriformes | SinFicha |
| 926 | Cachilo Corona Castaña | Aimophila strigiceps | Stripe-capped Sparrow | Emberizidae | Passeriformes | SinFicha |
| 929 | Cachilo de Antifaz | Coryphaspiza melanotis | Black-masked Finch | Emberizidae | Passeriformes | SinFicha |
| 798 | Cachirla Andina | Anthus bogotensis | Paramo Pipit | Motacillidae | Passeriformes | SinFicha |
| 793 | Cachirla Chica | Anthus chii | Yellowish Pipit | Motacillidae | Passeriformes | SinFicha |
| 792 | Cachirla Común | Anthus correndera | Correndera Pipit | Motacillidae | Passeriformes | SinFicha |
| 796 | Cachirla Dorada | Anthus nattereri | Ochre-breasted Pipit | Motacillidae | Passeriformes | SinFicha |
| 797 | Cachirla Grande | Anthus antarticus | South Georgia Pitpit | Motacillidae | Passeriformes | SinFicha |
| 795 | Cachirla Pálida | Anthus hellmayri | Hellmayr's Pipit | Motacillidae | Passeriformes | SinFicha |
| 794 | Cachirla Trinadora | Anthus chacoensis | Chaco Pipit | Motacillidae | Passeriformes | SinFicha |
| 791 | Cachirla Uña Corta | Anthus furcatus | Short-billed Pipit | Motacillidae | Passeriformes | SinFicha |
| 568 | Cacholote Castaño | Pseudoseisura lophotes | Brown Cacholote | Furnaridae | Passeriformes | SinFicha |
| 569 | Cacholote Pardo | Pseudoseisura gutturalis | White-throated Cacholote | Furnaridae | Passeriformes | SinFicha |
| 743 | Cachudito Pico Amarillo | Anairetes flavirostris | Yellow-billed Tit-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 744 | Cachudito Pico Negro | Anairetes parulus | Tufted Tit-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 349 | Calancante Cara Roja | Aratinga mitrata | Mitred Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 351 | Calancate Ala Roja | Aratinga leucophthalma | White-eyed Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 350 | Calancate Común | Aratinga acuticaudata | Blue-crowned Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 353 | Calancate Frente Dorada | Aratinga aurea | Peach-fronted Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 799 | Calandria Castaña | Mimus dorsalis | Brown-backed Mockingbird | Mimidae | Passeriformes | SinFicha |
| 801 | Calandria Grande | Mimus saturninus | Chalk-browed Mockingbird | Mimidae | Passeriformes | SinFicha |
| 802 | Calandria Mora | Mimus patagonicus | Patagonian Mockingbird | Mimidae | Passeriformes | SinFicha |
| 800 | Calandria Real | Mimus triurus | White-banded Mockingbird | Mimidae | Passeriformes | SinFicha |
| 690 | Calandrita | Stigmatura budytoides | Greater Wagtail-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 513 | Caminera Colorada | Geositta rufipennis | Rufous-banded Miner | Furnaridae | Passeriformes | SinFicha |
| 515 | Caminera Común | Geositta cunicularia | Common Miner | Furnaridae | Passeriformes | SinFicha |
| 514 | Caminera Grande | Geositta isabellina | Creamy-rumped Miner | Furnaridae | Passeriformes | SinFicha |
| 517 | Caminera Patagónica | Geositta antarctica | Short-billed Miner | Furnaridae | Passeriformes | SinFicha |
| 518 | Caminera Picuda | Geositta tenuirostris | Slender-billed Miner | Furnaridae | Passeriformes | SinFicha |
| 516 | Caminera Puneña | Geositta punensis | Puna Miner | Furnaridae | Passeriformes | SinFicha |
| 551 | Canastero Andino | Asthenes heterura | Iquico Canastero | Furnaridae | Passeriformes | SinFicha |
| 552 | Canastero Castaño | Asthenes steinbachi | Steinbach's Canastero | Furnaridae | Passeriformes | SinFicha |
| 549 | Canastero Chaqueño | Asthenes baeri | Short-billed Canastero | Furnaridae | Passeriformes | SinFicha |
| 550 | Canastero Coludo | Asthenes pyrrholeuca | Lesser Canastero | Furnaridae | Passeriformes | SinFicha |
| 555 | Canastero Patagónico | Asthenes patagonica | Patagonian Canastero | Furnaridae | Passeriformes | SinFicha |
| 554 | Canastero Pálido | Asthenes modesta | Cordilleran Canastero | Furnaridae | Passeriformes | SinFicha |
| 553 | Canastero Rojizo | Asthenes dorbignyi | Creamy-breasted Canastero | Furnaridae | Passeriformes | SinFicha |
| 892 | Capuchino Canela | Sporophila minuta | Ruddy-breasted Seedeater | Emberizidae | Passeriformes | SinFicha |
| 890 | Capuchino Castaño | Sporophila hypochroma | Gray-and-chestnut Seedeater | Emberizidae | Passeriformes | SinFicha |
| 889 | Capuchino Corona Gris | Sporophila cinnamomea | Chestnut Seedeater | Emberizidae | Passeriformes | SinFicha |
| 888 | Capuchino de Collar | Sporophila zelichi | Narosky's Seedeater | Emberizidae | Passeriformes | SinFicha |
| 891 | Capuchino Garganta Café | Sporophila ruficollis | Dark-throated Seedeater | Emberizidae | Passeriformes | SinFicha |
| 887 | Capuchino Pecho Blanco | Sporophila palustris | Marsh Seedeater | Emberizidae | Passeriformes | SinFicha |
| 162 | Caracolero Común | Rosthramus sociabilis | Snail Kite | Accipitridae | Falconiformes | SinFicha |
| 118 | Caranca | Chloephaga hybrida | Kelp Goose | Anatidae | Anseriformes | SinFicha |
| 197 | Carancho | Caracara plancus | Southern Caracara | Falconidae | Falconiformes | Fichado |
| 217 | Carau | Aramus guarauna | Limpkin | Aramidae | Gruiformes | SinFicha |
| 948 | Cardelino | Carduelis carduelis | European Goldfinch | Fringillidae | Passeriformes | SinFicha |
| 873 | Cardenal Amarillo | Gubernatrix cristata | Yellow Cardinal | Emberizidae | Passeriformes | SinFicha |
| 866 | Cardenal Común | Paroaria coronata | Red-crested Cardinal | Emberizidae | Passeriformes | SinFicha |
| 867 | Cardenilla | Paroaria capitata | Yellow-billed Cardinal | Emberizidae | Passeriformes | SinFicha |
| 492 | Carpinterito Común | Picumnus cirratus | White-barred Piculet | Picidae | Piciformes | SinFicha |
| 491 | Carpinterito Cuello Canela | Picumnus temminckii | Ochre-collared Piculet | Picidae | Piciformes | SinFicha |
| 490 | Carpinterito Ocelado | Picumnus dorbignyanus | Ocellated Piculet | Picidae | Piciformes | SinFicha |
| 489 | Carpinterito Ocráceo | Picumnus nebulosus | Mottled Piculet | Picidae | Piciformes | SinFicha |
| 472 | Carpintero Andino | Colaptes rupicola | Andean Flicker | Picidae | Piciformes | SinFicha |
| 481 | Carpintero Arcoiris | Melanerpes flavifrons | Yellow-fronted Woodpecker | Picidae | Piciformes | SinFicha |
| 483 | Carpintero Bataraz Chico | Picoides mixtus | Checkered Woodpecker | Picidae | Piciformes | SinFicha |
| 484 | Carpintero Bataraz Grande | Picoides lignarius | Striped Woodpecker | Picidae | Piciformes | SinFicha |
| 493 | Carpintero Blanco | Melanerpes candidus | White Woodpecker | Picidae | Piciformes | SinFicha |
| 471 | Carpintero Campestre | Colaptes campestris | Campo Flicker | Picidae | Piciformes | SinFicha |
| 494 | Carpintero Cara Canela | Dryocopus galeatus | Helmeted Woodpecker | Picidae | Piciformes | SinFicha |
| 476 | Carpintero Copete Amarillo | Celeus flavescens | Blond-crested Woodpecker | Picidae | Piciformes | SinFicha |
| 477 | Carpintero Copete Pajizo | Celeus lugubris | Pale-crested Woodpecker | Picidae | Piciformes | SinFicha |
| 482 | Carpintero del Cardón | Melanerpes cactorum | White-fronted Woodpecker | Picidae | Piciformes | SinFicha |
| 478 | Carpintero Dorado Común | Piculus chrysochloros | Golden-green Woodpecker | Picidae | Piciformes | SinFicha |
| 480 | Carpintero Dorado Gris | Piculus rubiginosus | Golden-olive Woodpecker | Picidae | Piciformes | SinFicha |
| 479 | Carpintero Dorado Verdoso | Piculus aurulentus | Yellow-browed Woodpecker | Picidae | Piciformes | SinFicha |
| 495 | Carpintero Garganta Estriada | Dryocopus lineatus | Lineated Woodpecker | Picidae | Piciformes | SinFicha |
| 498 | Carpintero Garganta Negra | Campephilus melanoleucus | Crimson-crested Woodpecker | Picidae | Piciformes | SinFicha |
| 500 | Carpintero Gigante | Campephilus magellanicus | Magellanic Woodpecker | Picidae | Piciformes | SinFicha |
| 499 | Carpintero Grande | Campephilus robustus | Robust Woodpecker | Picidae | Piciformes | SinFicha |
| 497 | Carpintero Lomo Blanco | Campephilus leucopogon | Cream-backed Woodpecker | Picidae | Piciformes | SinFicha |
| 496 | Carpintero Negro | Dryocopus schulzi | Black-bodied Woodpecker | Picidae | Piciformes | SinFicha |
| 488 | Carpintero Oliva Chico | Veniliornis passerinus | Little Woodpecker | Picidae | Piciformes | SinFicha |
| 486 | Carpintero Oliva Manchado | Veniliornis spilogaster | White-spotted Woodpecker | Picidae | Piciformes | SinFicha |
| 485 | Carpintero Oliva Oscuro | Veniliornis fumigatus | Smoky-brown Woodpecker | Picidae | Piciformes | SinFicha |
| 487 | Carpintero Oliva Yungueño | Veniliornis frontalis | Dot-fronted Woodpecker | Picidae | Piciformes | SinFicha |
| 473 | Carpintero Pitío | Colaptes pitius | Chilean Flicker | Picidae | Piciformes | SinFicha |
| 474 | Carpintero Real Común | Colaptes melanolaimus | Golden-breasted Woodpecker | Picidae | Piciformes | SinFicha |
| 475 | Carpintero Real Verde | Colaptes melanochloros | Green-barred Woodpecker | Picidae | Piciformes | SinFicha |
| 363 | Catita Cabeza Roja | Pionopsitta pileata | Pileated Parrot | Psittacidae | Psittaciformes | SinFicha |
| 362 | Catita Chirirí | Brotogeris versicolurus | White-winged Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 361 | Catita Enana | Forpus xanthopterygius | Blue-winged Parrotlet | Psittacidae | Psittaciformes | SinFicha |
| 360 | Catita Serrana Chica | Bolborhynchus aurifrons | Mountain Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 359 | Catita Serrana Grande | Bolborhynchus aymara | Grey-hooded Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 122 | Cauquén Colorado | Chloephaga rubidiceps | Ruddy-headed Goose | Anatidae | Anseriformes | SinFicha |
| 119 | Cauquén Común | Chloephaga picta | Upland Goose | Anatidae | Anseriformes | SinFicha |
| 121 | Cauquén Real | Chloephaga poliocephala | Ashy-headed Goose | Anatidae | Anseriformes | SinFicha |
| 148 | Cóndor Andino | Vultur gryphus | Andean Condor | Cathartidae | Falconiformes | SinFicha |
| 849 | Celestino Común | Thraupis sayaca | Sayaca Tanager | Thraupidae | Passeriformes | SinFicha |
| 850 | Celestino Olivaceo | Thraupis palmarum | Palm Tanager | Thraupidae | Passeriformes | SinFicha |
| 872 | Cerquero Amarillo | Atlapetes citrinellus | Yellow-striped Brush-Finch | Emberizidae | Passeriformes | SinFicha |
| 871 | Cerquero Cabeza Castaña | Atlapetes fulviceps | Fulvous-headed Brush-Finch | Emberizidae | Passeriformes | SinFicha |
| 869 | Cerquero de Collar | Arremon flavirostris | Saffron-billed Sparrow | Emberizidae | Passeriformes | SinFicha |
| 870 | Cerquero Vientre Blanco | Atlapetes torquatus | White-bellied Brush-Finch | Emberizidae | Passeriformes | SinFicha |
| 469 | Chacurú Cara Negra | Nystalus chacuru | White-eared Puffbird | Bucconidae | Piciformes | SinFicha |
| 467 | Chacurú Chico | Nonnula rubeluca | Rusty-breasted Nunlet | Bucconidae | Piciformes | SinFicha |
| 470 | Chacurú Grande | Notharchus macrorhynchus | White-necked Puffbird | Bucconidae | Piciformes | SinFicha |
| 109 | Chajá | Chauna torquata | Southern Screamer | Anhimidae | Anseriformes | SinFicha |
| 367 | Charao | Amazona pretrei | Red-spectacled Parrot | Psittacidae | Psittaciformes | SinFicha |
| 211 | Charata | Ortalis canicollis | Chaco Chachalaca | Cracidae | Galliformes | SinFicha |
| 963 | Charlatán | Dolichonyx oryzivorus | Bobolink | Icteridae | Passeriformes | SinFicha |
| 83 | Chiflón | Syrigma sibilatrix | Whistling Heron | Ardeidae | Ciconiiformes | SinFicha |
| 199 | Chimachima | Milvago chimachima | Yellow-headed Caracara | Falconidae | Falconiformes | SinFicha |
| 198 | Chimango | Milvago chimango | Chimango Caracara | Falconidae | Falconiformes | SinFicha |
| 506 | Chinchero Chico | Lepidocolaptes angustirostris | Narrow-billed Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 508 | Chinchero Enano | Lepidocolaptes fuscus | Lesser Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 507 | Chinchero Escamado | Lepidocolaptes squamatus | Scaled Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 505 | Chinchero Grande | Drymornis bridgesii | Scimitar-billed Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 927 | Chingolo | Zonotrichia capensis | Rufous-collared Sparrow | Emberizidae | Passeriformes | SinFicha |
| 219 | Chiricote | Aramides cajanea | Gray-necked Wood-Rail | Rallidae | Gruiformes | SinFicha |
| 357 | Chiripepé Cabeza Parda | Pyrrhura molinae | Green-cheeked Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 358 | Chiripepé Cabeza Verde | Pyrrhura frontalis | Maroon-bellied Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 816 | Chiví Común | Vireo olivaceus | Red-eyed Vireo | Vireonidae | Passeriformes | SinFicha |
| 815 | Chiví Coronado | Hylophilus poicilotis | Rufous-crowned Greenlet | Vireonidae | Passeriformes | SinFicha |
| 602 | Choca Amarilla | Dysithamnus mentalis | Plain Antvireo | Formicariidae | Passeriformes | SinFicha |
| 597 | Choca Común | Thamnophilus caerulescens | Variable Antshrike | Formicariidae | Passeriformes | SinFicha |
| 596 | Choca Corona Rojiza | Thamnophilus ruficapillus | Rufous-capped Antshrike | Formicariidae | Passeriformes | SinFicha |
| 603 | Choca Estriada | Dysithamnus stictothorax | Spot-breasted Antvireo | Formicariidae | Passeriformes | SinFicha |
| 595 | Choca Listada | Thamnophilus doliatus | Barred Antshrike | Formicariidae | Passeriformes | SinFicha |
| 10 | Choique | Pterocnemia pennata | Short Rhea | Rheidae | Struthioniformes | SinFicha |
| 953 | Chopí | Gnorimopsar chopi | Chopi Blackbird | Icteridae | Passeriformes | SinFicha |
| 263 | Chorlito Ceniciento | Pluvianellus socialis | Magellanic Plover | Chararidriidae | Charadriiformes | SinFicha |
| 260 | Chorlito de Collar | Charadrius collaris | Collared Plover | Chararidriidae | Charadriiformes | SinFicha |
| 264 | Chorlito de Vincha | Phergornis mitchellii | Diademed Sandpiper-Plover | Chararidriidae | Charadriiformes | SinFicha |
| 258 | Chorlito Doble Collar | Charadrius falklandicus | Two-banded Plover | Chararidriidae | Charadriiformes | SinFicha |
| 259 | Chorlito Palmado | Charadrius semipalmatus | Semipalmated Plover | Chararidriidae | Charadriiformes | SinFicha |
| 262 | Chorlito Pecho Canela | Zonibyx modestus | Rufous-chested Plove | Chararidriidae | Charadriiformes | SinFicha |
| 261 | Chorlito Puneño | Charadrius alticola | Puna Plover | Chararidriidae | Charadriiformes | SinFicha |
| 255 | Chorlo Artico | Pluvialis squatarola | Black-bellied Plover | Chararidriidae | Charadriiformes | SinFicha |
| 257 | Chorlo Cabezón | Oreopholus ruficollis | Tawny-throated Dotterel | Chararidriidae | Charadriiformes | SinFicha |
| 256 | Chorlo Pampa | Pluvialis dominica | American Golden-Plover | Chararidriidae | Charadriiformes | SinFicha |
| 598 | Chororó | Taraba major | Great Antshrike | Formicariidae | Passeriformes | SinFicha |
| 560 | Chotoy | Schoeniophylax phryganophila | Chotoy Spinetail | Furnaridae | Passeriformes | SinFicha |
| 244 | Chuña Patas Negras | Chunga burmeisteri | Black-legged Seriema | Cariamidae | Gruiformes | SinFicha |
| 245 | Chuña Patas Rojas | Cariama cristata | Red-legged Seriema | Cariamidae | Gruiformes | SinFicha |
| 617 | Chucao | Scelorchilus rubecula | Chucao Tapaculo | Rhinocryptidae | Passeriformes | SinFicha |
| 612 | Chululú Cabeza Rojiza | Grallaria albigula | White-throated Antpitta | Formicariidae | Passeriformes | SinFicha |
| 613 | Chululú Chico | Grallaria ochroleuca | Speckle-breasted Antpitta | Formicariidae | Passeriformes | SinFicha |
| 611 | Chululú Pintado | Grallaria varia | Variegated Antpitta | Formicariidae | Passeriformes | SinFicha |
| 614 | Chupadientes | Conopophaga lineata | Rufous Gnateater | Formicariidae | Passeriformes | SinFicha |
| 624 | Churrín Andino | Scytalopus magellanicus | Magellanic Tapaculo | Rhinocryptidae | Passeriformes | SinFicha |
| 622 | Churrín Ceja Blanca | Scytalopus superciliaris | White-browed Tapaculo | Rhinocryptidae | Passeriformes | SinFicha |
| 616 | Churrín Grande | Eugralla paradoxa | Ochre-flanked Tapaculo | Rhinocryptidae | Passeriformes | SinFicha |
| 623 | Churrín Plomizo | Scytalopus speluncae | Mouse-colored Tapaculo | Rhinocryptidae | Passeriformes | SinFicha |
| 734 | Churrinche | Pyrocephalus rubinus | Vermilion Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 96 | Cigüeña Americana | Ciconia maguari | Maguari Stork | Ciconidae | Ciconiiformes | SinFicha |
| 117 | Cisne Cuello Negro | Cygnus melanocorypha | Black-necked Swan | Anatidae | Anseriformes | SinFicha |
| 216 | Codorniz de California | Lophortyx californica | California Quail | Phasianidae | Galliformes | SinFicha |
| 434 | Colibrí Chico | Colibri thalassinus | Green Violet-ear | Trochilidae | Trochiliformes | SinFicha |
| 432 | Colibrí Grande | Colibri coruscans | Sparkling Violet-ear | Trochilidae | Trochiliformes | SinFicha |
| 433 | Colibrí Mediano | Colibri serrirostris | White-vented Violet-ear | Trochilidae | Trochiliformes | SinFicha |
| 545 | Colilarga | Sylviorthorhynchus desmursii | Des Murs's Wiretail | Furnaridae | Passeriformes | SinFicha |
| 16 | Colorada | Rhynchotus rufescens | Red-winged Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 572 | Coludito Canela | Leptasthenura fuliginiceps | Brown-capped Tit-Spinetail | Furnaridae | Passeriformes | SinFicha |
| 574 | Coludito Cola Negra | Leptasthenura aegithaloides | Plain-mantled Tit-Spinetail | Furnaridae | Passeriformes | SinFicha |
| 571 | Coludito Copetón | Leptasthenura platensis | Tufted Tit-Spinetail | Furnaridae | Passeriformes | SinFicha |
| 570 | Coludito de los Pinos | Leptasthenura setaria | Araucaria Tit-Spinetail | Furnaridae | Passeriformes | SinFicha |
| 573 | Coludito Puneño | Leptasthenura yanacensis | Tawny Tit-Spinetail | Furnaridae | Passeriformes | SinFicha |
| 939 | Coludo Chico | Emberizoides ypiranganus | Lesser Grass-Finch | Emberizidae | Passeriformes | SinFicha |
| 940 | Coludo Grande | Emberizoides herbicola | Wedge-tailed Grass-Finch | Emberizidae | Passeriformes | SinFicha |
| 915 | Comesebo Andino | Phrygilus gayi | Gray-hooded Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 917 | Comesebo Cabeza Negra | Phrygilus atriceps | Black-hooded Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 916 | Comesebo Patagónico | Phrygilus patagonicus | Patagonian Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 918 | Comesebo Puneño | Phrygilus dorsalis | Red-backed Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 449 | Coqueta Verde | Lophornis chalybea | Festive Coquette | Trochilidae | Trochiliformes | SinFicha |
| 883 | Corbatita Amarillo | Sporophila nigricollis | Yellow-bellied Seedeater | Emberizidae | Passeriformes | SinFicha |
| 894 | Corbatita Blanco | Sporophila leucoptera | White-bellied Seedeater | Emberizidae | Passeriformes | SinFicha |
| 893 | Corbatita Boina Negra | Sporophila bouvreuil | Capped Seedeater | Emberizidae | Passeriformes | SinFicha |
| 884 | Corbatita Común | Sporophila caerulescens | Double-collared Seedeater | Emberizidae | Passeriformes | SinFicha |
| 886 | Corbatita Domino | Sporophila collaris | Rusty-collared Seedeater | Emberizidae | Passeriformes | SinFicha |
| 881 | Corbatita Oliváceo | Sporophila frontalis | Buffy-fronted Seedeater | Emberizidae | Passeriformes | SinFicha |
| 885 | Corbatita Overo | Sporophila lineola | Lined Seedeater | Emberizidae | Passeriformes | SinFicha |
| 882 | Corbatita Picudo | Sporophila falcirostris | Temminck's Seedeater | Emberizidae | Passeriformes | SinFicha |
| 880 | Corbatita Plomizo | Sporophila plumbea | Plumbeous Seedeater | Emberizidae | Passeriformes | SinFicha |
| 76 | Cormorán Cuello Negro | Phalacrocorax magellanicus | Rock Shag | Phalacrocoracidae | Pelecaniformes | SinFicha |
| 75 | Cormorán Gris | Phalacrocorax gaimardi | Red-legged Cormorant | Phalacrocoracidae | Pelecaniformes | SinFicha |
| 79 | Cormorán Imperial | Phalacrocorax atriceps | Imperial Shag | Phalacrocoracidae | Pelecaniformes | SinFicha |
| 78 | Cormorán Real | Phalacrocorax albiventer | King Cormorant | Phalacrocoracidae | Pelecaniformes | SinFicha |
| 630 | Cortarramas | Phytotoma rutila | White-tipped Plantcutter | Phytotomidae | Passeriformes | SinFicha |
| 116 | Coscoroba | Coscoroba coscoroba | Coscoroba Swan | Anatidae | Anseriformes | SinFicha |
| 356 | Cotorra | Myiopsitta monachus | Monk Parakeet | Psittacidae | Psittaciformes | SinFicha |
| 380 | Crespín | Tapera naevia | Striped Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 535 | Crestudo | Coryphistera alaudina | Lark-like Brushrunner | Furnaridae | Passeriformes | SinFicha |
| 372 | Cuclillo Canela | Coccyzus melacoryphus | Dark-billed Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 371 | Cuclillo Ceniciento | Coccyzus euleri | Pearly-breasted Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 373 | Cuclillo Chico | Coccyzus cinereus | Ash-colored Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 370 | Cuclillo Ojo Colorado | Coccyzus erythropthalmus | Black-billed Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 369 | Cuclillo Pico Amarillo | Coccyzus americanus | Yellow-billed Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 102 | Cuervillo Cara Pelada | Phimosus infuscatus | Bare-faced Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 104 | Cuervillo de Cañada | Plegadis chihi | White-faced Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 103 | Cuervillo Puneño | Plegadis ridgwayi | Puna Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 410 | Curiango | Nyctidromus albicollis | Pauraque | Caprimulgidae | Caprimulgiformes | SinFicha |
| 897 | Curió | Oryzoborus angolensis | Chestnut-bellied Seed-Finch | Emberizidae | Passeriformes | SinFicha |
| 547 | Curutié Blanco | Cranioleuca pyrrhophia | Stripe-crowned Spinetail | Furnaridae | Passeriformes | SinFicha |
| 542 | Curutié Colorado | Certhiaxis cinnamomea | Yellow-chinned Spinetail | Furnaridae | Passeriformes | SinFicha |
| 541 | Curutié Ocráceo | Cranioleuca sulphurifera | Sulphur-bearded Spinetail | Furnaridae | Passeriformes | SinFicha |
| 548 | Curutié Olivaceo | Cranioleuca obsoleta | Olive Spinetail | Furnaridae | Passeriformes | SinFicha |
| 859 | Diadema | Catamblyrhynchus diadema | Plush-capped Finch | Thraupidae | Passeriformes | SinFicha |
| 901 | Diuca Ala Blanca | Diuca speculifera | White-winged Diuca-Finch | Emberizidae | Passeriformes | SinFicha |
| 900 | Diuca Común | Diuca diuca | Common Diuca-Finch | Emberizidae | Passeriformes | SinFicha |
| 655 | Diucón | Xolmis pyrope | Fire-eyed Diucon | Tyrannidae | Passeriformes | SinFicha |
| 735 | Doradito Común | Pseudocolopteryx flaviventris | Warbling Doradito | Tyrannidae | Passeriformes | SinFicha |
| 738 | Doradito Copetón | Pseudocolopteryx sclateri | Crested Doradito | Tyrannidae | Passeriformes | SinFicha |
| 736 | Doradito Oliváceo | Pseudocolopteryx acutipennis | Subtropical Doradito | Tyrannidae | Passeriformes | SinFicha |
| 737 | Doradito Pardo | Pseudocolopteryx dinellianus | Dinelli's Doradito | Tyrannidae | Passeriformes | SinFicha |
| 659 | Dormilona Canela | Muscisaxicola capistrata | Cinnamon-bellied Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 664 | Dormilona Cara Negra | Muscisaxicola macloviana | Dark-faced Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 662 | Dormilona Ceja Blanca | Muscisaxicola albilora | White-browed Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 658 | Dormilona Cenicienta | Muscisaxicola cinerea | Cinereous Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 665 | Dormilona Chica | Muscisaxicola maculirostris | Spot-billed Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 663 | Dormilona Fraile | Muscisaxicola flavinucha | Ochre-naped Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 657 | Dormilona Frente Negra | Muscisaxicola frontalis | Black-fronted Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 660 | Dormilona Gris | Muscisaxicola rufivertex | Rufous-naped Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 661 | Dormilona Puneña | Muscisaxicola juninensis | Puna Ground-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 468 | Durmilí | Nystalus maculatus | Spot-backed Puffbird | Bucconidae | Piciformes | SinFicha |
| 425 | Ermitaño Canela | Phaethornis pretrei | Planalto Hermit | Trochilidae | Trochiliformes | SinFicha |
| 424 | Ermitaño Escamado | Phaethornis eurynome | Scale-throated Hermit | Trochilidae | Trochiliformes | SinFicha |
| 296 | Escúa Antártica | Catharacta lonnbergi | Anctartic Skua | Stercorariidae | Charadriiformes | SinFicha |
| 295 | Escúa Comun | Catharacta chilensis | Chilean Skua | Stercorariidae | Charadriiformes | SinFicha |
| 297 | Escúa Polar | Catharacta maccormicki | South Polar Skua | Stercorariidae | Charadriiformes | SinFicha |
| 558 | Espartillero Austral | Asthenes anthoides | Austral Canastero | Furnaridae | Passeriformes | SinFicha |
| 544 | Espartillero Enano | Spartonoica maluroides | Bay-capped Wren-Spinetail | Furnaridae | Passeriformes | SinFicha |
| 559 | Espartillero Estriado | Asthenes maculicauda | Scribble-tailed Canastero | Furnaridae | Passeriformes | SinFicha |
| 556 | Espartillero Pampeano | Asthenes hudsoni | Hudson's Canastero | Furnaridae | Passeriformes | SinFicha |
| 557 | Espartillero Serrano | Asthenes sclateri | Puna Canastero | Furnaridae | Passeriformes | SinFicha |
| 171 | Esparvero Chico | Accipiter superciliosus | Tiny Hawk | Accipitridae | Falconiformes | SinFicha |
| 170 | Esparvero Común | Accipiter striatus | Sharp-shinned Hawk | Accipitridae | Falconiformes | SinFicha |
| 168 | Esparvero Grande | Accipiter poliogaster | Gray-bellied Goshawk | Accipitridae | Falconiformes | SinFicha |
| 169 | Esparvero Variado | Accipiter bicolor | Bicolored Hawk | Accipitridae | Falconiformes | SinFicha |
| 105 | Espátula Rosada | Platalea ajaja | Roseate Spoonbill | Threskiornithidae | Ciconiiformes | SinFicha |
| 896 | Espiguero Negro | Tiaris fuliginosa | Sooty Grassquit | Emberizidae | Passeriformes | SinFicha |
| 895 | Espiguero Pardo | Tiaris obscura | Dull-colored Grassquit | Emberizidae | Passeriformes | SinFicha |
| 577 | Espinero Andino | Phacellodomus striaticeps | Streak-fronted Thornbird | Furnaridae | Passeriformes | SinFicha |
| 578 | Espinero Chico | Phacellodomus sibilatrix | Little Thornbird | Furnaridae | Passeriformes | SinFicha |
| 576 | Espinero Frente Rojiza | Phacellodomus rufifrons | Common Thornbird | Furnaridae | Passeriformes | SinFicha |
| 575 | Espinero Grande | Phacellodomus ruber | Greater Thornbird | Furnaridae | Passeriformes | SinFicha |
| 579 | Espinero Pecho Manchado | Phacellodomus striaticollis | Freckle-breasted Thornbird | Furnaridae | Passeriformes | SinFicha |
| 580 | Espinero Serrano | Phacellodomus maculipectus | Spot-breasted Thornbird | Furnaridae | Passeriformes | SinFicha |
| 974 | Estornino Crestado | Acridotheres critatellus | Gray-bellied Goshawk | Ploceidae | Passeriformes | SinFicha |
| 973 | Estornino Pinto | Sturnus vulgaris | European Starling | Ploceidae | Passeriformes | SinFicha |
| 287 | Falaropo Común | Phalaropus tricolor | Wilson's Phalarope | Phalaropodidae | Charadriiformes | SinFicha |
| 289 | Falaropo Pico fino | Phalaropus lobatus | Red-necked Phalarope | Phalaropodidae | Charadriiformes | SinFicha |
| 288 | Falaropo Pico grueso | Phalaropus fulicarius | Red Phalarope | Phalaropodidae | Charadriiformes | SinFicha |
| 968 | Federal | Amblyramphus holosericeus | Scarlet-headed Blackbird | Icteridae | Passeriformes | SinFicha |
| 754 | Fiofío Belicoso | Elaenia chiriquensis | Lesser Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 756 | Fiofío Ceniciento | Myiopagis caniceps | Gray Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 749 | Fiofío Copetón | Elaenia flavogaster | Yellow-bellied Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 755 | Fiofío Corona Dorada | Myiopagis viridicata | Greenish Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 748 | Fiofío Grande | Elaenia spectabilis | Large Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 753 | Fiofío Oliváceo | Elaenia mesoleuca | Olivaceous Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 747 | Fiofío Oscuro | Elaenia obscura | Highland Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 752 | Fiofío Pico Corto | Elaenia parvirostris | Small-billed Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 751 | Fiofío Silbón | Elaenia albiceps | White-crested Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 750 | Fiofio Plomizo | Elaenia strepera | Slaty Elaenia | Tyrannidae | Passeriformes | SinFicha |
| 106 | Flamenco Austral | Phoenicopterus chilensis | Chilean Flamingo | Phoenicopteridae | Phoenicopteriformes | SinFicha |
| 848 | Frutero Azul | Stephanophorus diadematus | Diademed Tanager | Thraupidae | Passeriformes | SinFicha |
| 843 | Frutero Cabeza Negra | Nemosia pileata | Hooded Tanager | Thraupidae | Passeriformes | SinFicha |
| 845 | Frutero Corona Amarilla | Trichothraupis melanops | Black-goggled Tanager | Thraupidae | Passeriformes | SinFicha |
| 846 | Frutero Coronado | Tachyphonus coronatus | Ruby-crowned Tanager | Thraupidae | Passeriformes | SinFicha |
| 847 | Frutero Negro | Tachyphonus rufus | White-lined Tanager | Thraupidae | Passeriformes | SinFicha |
| 844 | Frutero Overo | Cissopis leveriana | Magpie Tanager | Thraupidae | Passeriformes | SinFicha |
| 839 | Frutero Yungueño | Chlorospingus ophtalmicus | Common Bush-Tanager | Thraupidae | Passeriformes | SinFicha |
| 854 | Fueguero común | Piranga flava | Hepatic Tanager | Thraupidae | Passeriformes | SinFicha |
| 852 | Fueguero Escarlata | Ramphocelus bresilius | Brazilian Tanager | Thraupidae | Passeriformes | SinFicha |
| 853 | Fueguero Morado | Habia rubica | Red-crowned Ant-Tanager | Thraupidae | Passeriformes | SinFicha |
| 235 | Gallareta Andina | Fulica americana | American Coot | Rallidae | Gruiformes | SinFicha |
| 237 | Gallareta Chica | Fulica leucoptera | White-winged Coot | Rallidae | Gruiformes | SinFicha |
| 234 | Gallareta Cornuda | Fulica cornuta | Horned Coot | Rallidae | Gruiformes | SinFicha |
| 238 | Gallareta Escudete Rojo | Fulica rufifrons | Red-fronted Coot | Rallidae | Gruiformes | SinFicha |
| 233 | Gallareta Gigante | Fulica gigantea | Giant Coot | Rallidae | Gruiformes | SinFicha |
| 236 | Gallareta Ligas Rojas | Fulica armillata | Red-gartered Coot | Rallidae | Gruiformes | SinFicha |
| 223 | Gallineta Chica | Rallus antarcticus | Austral Rail | Rallidae | Gruiformes | SinFicha |
| 221 | Gallineta Común | Rallus sanguinolentus | Plumbeous Rail | Rallidae | Gruiformes | SinFicha |
| 222 | Gallineta Negruzca | Rallus nigricans | Blackish Rail | Rallidae | Gruiformes | SinFicha |
| 224 | Gallineta Overa | Pardirallus maculatus | Spotted Rail | Rallidae | Gruiformes | SinFicha |
| 619 | Gallito Arena | Teledromas fuscus | Sandy Gallito | Rhinocryptidae | Passeriformes | SinFicha |
| 618 | Gallito Copetón | Rhinocrypta lanceolata | Crested Gallito | Rhinocryptidae | Passeriformes | SinFicha |
| 620 | Gallito de Collar | Melanopareia maximiliani | Olive-crowned Crescent-chest | Rhinocryptidae | Passeriformes | SinFicha |
| 621 | Gallito Overo | Psilorhamphus guttatus | Spotted Bamboowren | Rhinocryptidae | Passeriformes | SinFicha |
| 112 | Ganso de Monte | Neochen jubata | Orinoco Goose | Anatidae | Anseriformes | SinFicha |
| 92 | Garcita Azulada | Butorides striatus | Striated Heron | Ardeidae | Ciconiiformes | SinFicha |
| 88 | Garcita Blanca | Egretta thula | Snowy Egret | Ardeidae | Ciconiiformes | SinFicha |
| 89 | Garcita Bueyera | Bubulcus ibis | Cattle Egret | Ardeidae | Ciconiiformes | SinFicha |
| 91 | Garcita Real | Pilherodius pileatus | Capped Heron | Ardeidae | Ciconiiformes | SinFicha |
| 90 | Garza Azul | Egretta caerulea | Little Blue Heron | Ardeidae | Ciconiiformes | SinFicha |
| 87 | Garza Blanca | Egretta alba | Snowy Egret | Ardeidae | Ciconiiformes | SinFicha |
| 93 | Garza Bruja | Nycticorax nycticorax | Black-crowned Night-Heron | Ardeidae | Ciconiiformes | SinFicha |
| 94 | Garza Cucharona | Cochlearius cochlearius | Boat-billed Heron | Ardeidae | Ciconiiformes | SinFicha |
| 80 | Garza Mora | Ardea cocoi | Cocoi Heron | Ardeidae | Ciconiiformes | SinFicha |
| 645 | Gaucho Andino | Agriornis andicola | White-tailed Shrike-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 647 | Gaucho Chico | Agriornis murina | Lesser Shrike-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 644 | Gaucho Común | Agriornis microptera | Gray-bellied Shrike-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 643 | Gaucho Grande | Agriornis livida | Great Shrike-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 646 | Gaucho Serrano | Agriornis montana | Black-billed Shrike-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 166 | Gavilán Ceniciento | Circus cinereus | Cinereous Harrier | Accipitridae | Falconiformes | SinFicha |
| 161 | Gavilán Mixto | Parabuteo unicinctus | Harris's Hawk | Accipitridae | Falconiformes | SinFicha |
| 183 | Gavilán Patas Largas | Geranospiza caerulescens | Crane Hawk | Accipitridae | Falconiformes | SinFicha |
| 165 | Gavilán Planeador | Circus buffoni | Long-winged Harrier | Accipitridae | Falconiformes | SinFicha |
| 304 | Gaviota Andina | Larus serranus | Andean Gull | Laridae | Charadriiformes | SinFicha |
| 303 | Gaviota Cangrejera | Larus atlanticus | Olrog's Gull | Laridae | Charadriiformes | SinFicha |
| 306 | Gaviota Capucho Café | Larus maculipennis | Brown-hooded Gull | Laridae | Charadriiformes | SinFicha |
| 305 | Gaviota Capucho Gris | Larus cirrocephalus | Gray-headed Gull | Laridae | Charadriiformes | SinFicha |
| 307 | Gaviota Chica | Larus pipixcan | Franklin's Gull | Laridae | Charadriiformes | SinFicha |
| 302 | Gaviota Cocinera | Larus dominicanus | Kelp Gull | Laridae | Charadriiformes | SinFicha |
| 301 | Gaviota Gris | Larus scoresbii | Dolphin Gull | Laridae | Charadriiformes | SinFicha |
| 313 | Gaviotín Antártico | Sterna vittata | Antarctic Tern | Sternidae | Charadriiformes | SinFicha |
| 312 | Gaviotín Artico | Sterna paradisaea | Arctic Tern | Sternidae | Charadriiformes | SinFicha |
| 315 | Gaviotín Chico Común | Sterna superciliaris | Yellow-billed Tern | Sternidae | Charadriiformes | SinFicha |
| 310 | Gaviotín Golondrina | Sterna hirundo | Common Tern | Sternidae | Charadriiformes | SinFicha |
| 309 | Gaviotín Lagunero | Sterna trudeaui | Snowy-crowned Tern | Sternidae | Charadriiformes | SinFicha |
| 316 | Gaviotín Negro | Chlidonias niger | Black Tern | Sternidae | Charadriiformes | SinFicha |
| 317 | Gaviotín pico amarillo | Sterna eurygnatha | Cayenne Tern | Sternidae | Charadriiformes | SinFicha |
| 308 | Gaviotín Pico Grueso | Gelochelidon nilotica | Gull-billed Tern | Sternidae | Charadriiformes | SinFicha |
| 318 | Gaviotín pico negro | Sterna sandvicensis | Sandwich Tern | Sternidae | Charadriiformes | SinFicha |
| 319 | Gaviotín Real | Sterna maxima | Royal Tern | Sternidae | Charadriiformes | SinFicha |
| 311 | Gaviotín Sudamericano | Sterna hirundinacea | South American Tern | Sternidae | Charadriiformes | SinFicha |
| 776 | Golondrina Ala Blanca | Tachycineta albiventer | White-winged Swallow | Hirundinidae | Passeriformes | SinFicha |
| 769 | Golondrina Andina | Hirundo andaecola | Andean Swallow | Hirundinidae | Passeriformes | SinFicha |
| 778 | Golondrina Barranquera | Notiochelidon cyanoleuca | Blue-and-white Swallow | Hirundinidae | Passeriformes | SinFicha |
| 781 | Golondrina Cabeza Rojiza | Stelgidopteryx fucata | Tawny-headed Swallow | Hirundinidae | Passeriformes | SinFicha |
| 774 | Golondrina Ceja Blanca | Tachycineta leucorrhoa | White-rumped Swallow | Hirundinidae | Passeriformes | SinFicha |
| 779 | Golondrina de Collar | Atticora melanoleuca | Black-collared Swallow | Hirundinidae | Passeriformes | SinFicha |
| 772 | Golondrina Doméstica | Progne chalybea | Gray-breasted Martin | Hirundinidae | Passeriformes | SinFicha |
| 771 | Golondrina Negra | Progne modesta | Galapagos Martin | Hirundinidae | Passeriformes | SinFicha |
| 773 | Golondrina Parda | Phaeoprogne tapera | Brown-chested Martin | Hirundinidae | Passeriformes | SinFicha |
| 775 | Golondrina Patagónica | Tachycineta leucopyga | Chilean Swallow | Hirundinidae | Passeriformes | SinFicha |
| 770 | Golondrina Purpúrea | Progne subis | Purple Martin | Hirundinidae | Passeriformes | SinFicha |
| 768 | Golondrina Rabadilla Canela | Petrochelidon pyrrhonota | Cliff Swallow | Hirundinidae | Passeriformes | SinFicha |
| 780 | Golondrina Ribereña | Stelgidopteryx ruficollis | Southern Rough-winged Swallow | Hirundinidae | Passeriformes | SinFicha |
| 767 | Golondrina Tijerita | Hirundo rustica | Barn Swallow | Hirundinidae | Passeriformes | SinFicha |
| 777 | Golondrina Zapadora | Riparia riparia | Bank Swallow | Hirundinidae | Passeriformes | SinFicha |
| 972 | Gorrión | Passer domesticus | House Sparrow | Ploceidae | Passeriformes | SinFicha |
| 345 | Guacamayo Rojo | Ara chloropterus | Red-and-green Macaw | Psittacidae | Psittaciformes | SinFicha |
| 346 | Guacamayo Verde | Ara militaris | Military Macaw | Psittacidae | Psittaciformes | SinFicha |
| 202 | Guaicurú | Herpetotheres cachinnans | Laughing Falcon | Falconidae | Falconiformes | SinFicha |
| 77 | Guanay | Phalacrocorax bougainvillii | Guanay Cormorant | Phalacrocoracidae | Pelecaniformes | SinFicha |
| 120 | Guayata | Chloephaga melanoptera | Andean Goose | Anatidae | Anseriformes | SinFicha |
| 201 | Halcón Montes Chico | Micrastur ruficollis | Barred Forest-Falcon | Falconidae | Falconiformes | SinFicha |
| 200 | Halcón Montes Grande | Micrastur semitorquatus | Collared Forest-Falcon | Falconidae | Falconiformes | SinFicha |
| 207 | Halcón Negro Chico | Falco rufigularis | Bat Falcon | Falconidae | Falconiformes | SinFicha |
| 206 | Halcón Negro Grande | Falco deiroleucus | Orange-breasted Falcon | Falconidae | Falconiformes | SinFicha |
| 204 | Halcón Peregrino | Falco peregrinus | Peregrine Falcon | Falconidae | Falconiformes | SinFicha |
| 205 | Halcón Plomizo | Falco femoralis | Aplomado Falcon | Falconidae | Falconiformes | SinFicha |
| 208 | Halconcito Colorado | Falco sparverius | American Kestrel | Falconidae | Falconiformes | SinFicha |
| 203 | Halconcito Gris | Spiziapteryx circumcinctus | Spot-winged Falconet | Falconidae | Falconiformes | SinFicha |
| 191 | Harpía | Harpia harpyja | Harpy Eagle | Accipitridae | Falconiformes | SinFicha |
| 81 | Hocó Colorado | Tigrisoma lineatum | Rufescent Tiger-Heron | Ardeidae | Ciconiiformes | SinFicha |
| 82 | Hocó Oscuro | Tigrisoma fasciatum | Fasciated Tiger-Heron | Ardeidae | Ciconiiformes | SinFicha |
| 533 | Hornero | Furnarius rufus | Rufous Hornero | Furnaridae | Passeriformes | SinFicha |
| 534 | Hornero Copetón | Furnarius cristatus | Crested Hornero | Furnaridae | Passeriformes | SinFicha |
| 615 | Huet-huet | Pteroptochos tarnii | Black-throated Huet-huet | Rhinocryptidae | Passeriformes | SinFicha |
| 20 | Inambú Común | Nothura maculosa | Spotted Nothura | Tinamidae | Tinamiformes | SinFicha |
| 18 | Inambú Montaraz | Nothoprocta cinerascens | Brushland Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 21 | Inambú Pálido | Nothura darwinii | Darwin's Nothura | Tinamidae | Tinamiformes | SinFicha |
| 17 | Inambú Serrano | Nothoprocta ornata | Ornate Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 19 | Inambú Silbón | Nothoprocta pentlandii | Andean Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 218 | Ipacaá | Aramides ypecaha | Giant Wood-Rail | Rallidae | Gruiformes | SinFicha |
| 243 | Ipequí | Heliornis fulica | Sungrebe | Heliornithidae | Gruiformes | SinFicha |
| 246 | Jacana | Jacana jacana | Wattled Jacana | Jacanidae | Charadriiformes | SinFicha |
| 904 | Jilguero Austral | Sicalis lebruni | Patagonian Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 908 | Jilguero Cara Gris | Sicalis uropygialis | Bright-rumped Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 910 | Jilguero Cola Blanca | Sicalis citrina | Stripe-tailed Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 909 | Jilguero Corona Gris | Sicalis luteocephala | Citron-headed Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 903 | Jilguero Dorado | Sicalis flaveola | Saffron Finch | Emberizidae | Passeriformes | SinFicha |
| 905 | Jilguero Grande | Sicalis auriventris | Greater Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 907 | Jilguero Oliváceo | Sicalis olivascens | Greenish Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 906 | Jilguero Puneño | Sicalis lutea | Puna Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 150 | Jote Cabeza Amarilla | Cathartes burrovianus | Lesser Yellow-headed Vulture | Cathartidae | Falconiformes | SinFicha |
| 149 | Jote Cabeza Colorada | Cathartes aura | Turkey Vulture | Cathartidae | Falconiformes | SinFicha |
| 151 | Jote Cabeza Negra | Coragyps atratus | Black Vulture | Cathartidae | Falconiformes | SinFicha |
| 152 | Jote Real | Sarcoramphus papa | King Vulture | Cathartidae | Falconiformes | SinFicha |
| 817 | Juan Chiviro | Cyclarhis gujanensis | Rufous-browed Peppershrike | Vireonidae | Passeriformes | SinFicha |
| 543 | Junquero | Phleocryptes melanops | Wren-like Rushbird | Furnaridae | Passeriformes | SinFicha |
| 765 | Ladrillito | Mionectes rufiventris | Gray-hooded Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 685 | Lavandera | Fluvicola leucocephala | White-headed Marsh-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 536 | Leñatero | Anumbius annumbi | Firewood-gatherer | Furnaridae | Passeriformes | SinFicha |
| 387 | Lechucita Canela | Aegolius harrisii | Buff-fronted Owl | Strigidae | Strigiformes | SinFicha |
| 388 | Lechucita Vizcachera | Athene cunicularia | Burrowing Owl | Strigidae | Strigiformes | Fichado |
| 397 | Lechuza Bataraz | Strix rufipes | Rufous-legged Owl | Strigidae | Strigiformes | SinFicha |
| 382 | Lechuza de Campanario | Tyto alba | Barn Owl | Tytonidae | Strigiformes | SinFicha |
| 386 | Lechuza Estriada | Ciccaba virgata | Mottled Owl | Strigidae | Strigiformes | SinFicha |
| 396 | Lechuza Listada | Strix hylophila | Rusty-barred Owl | Strigidae | Strigiformes | SinFicha |
| 385 | Lechuza Negra | Ciccaba huhula | Black-banded Owl | Strigidae | Strigiformes | SinFicha |
| 399 | Lechuzón de Campo | Asio flammeus | Short-eared Owl | Strigidae | Strigiformes | SinFicha |
| 395 | Lechuzón Mocho Chico | Pulsatrix koeniswaldiana | Tawny-browed Owl | Strigidae | Strigiformes | SinFicha |
| 394 | Lechuzón Mocho Grande | Pulsatrix perspicillata | Spectacled Owl | Strigidae | Strigiformes | SinFicha |
| 398 | Lechuzón Negruzco | Asio stygius | Stygian Owl | Strigidae | Strigiformes | SinFicha |
| 384 | Lechuzón Orejudo | Asio clamator | Striped Owl | Strigidae | Strigiformes | SinFicha |
| 969 | Loica Común | Sturnella loyca | Long-tailed Meadowlark | Icteridae | Passeriformes | SinFicha |
| 970 | Loica Pampeana | Sturnella defilippii | Pampas Meadowlark | Icteridae | Passeriformes | SinFicha |
| 368 | Loro Alisero | Amazona tucumana | Tucuman Parrot | Psittacidae | Psittaciformes | SinFicha |
| 352 | Loro Barranquero | Cyanoliseus patagonus | Burrowing Parrot | Psittacidae | Psittaciformes | SinFicha |
| 366 | Loro Hablador | Amazona aestiva | Blue-fronted Parrot | Psittacidae | Psittaciformes | SinFicha |
| 364 | Loro Maitaca | Pionus maximiliani | Scaly-headed Parrot | Psittacidae | Psittaciformes | SinFicha |
| 365 | Loro Vinoso | Amazona vinacea | Vinaceous Parrot | Psittacidae | Psittaciformes | SinFicha |
| 27 | Macá Común | Podiceps rolland | White-tufted Grebe | Podicipedidae | podicipediformes | SinFicha |
| 31 | Macá Grande | Podiceps major | Great Grebe | Podicipedidae | podicipediformes | SinFicha |
| 26 | Macá Gris | Podiceps dominicus | Least Grebe | Podicipedidae | podicipediformes | SinFicha |
| 30 | Macá Pico Grueso | Podilymbus podiceps | Pied-billed Grebe | Podicipedidae | podicipediformes | SinFicha |
| 28 | Macá Plateado | Podiceps occipitalis | Silvery Grebe | Podicipedidae | podicipediformes | SinFicha |
| 29 | Macá Tobiano | Podiceps gallardoi | Hooded Grebe | Podicipedidae | podicipediformes | SinFicha |
| 15 | Macuco | Tinamus solitarius | Solitary Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 532 | Macuquito | Lochmias nematura | Sharp-tailed Streamcreeper | Furnaridae | Passeriformes | SinFicha |
| 348 | Maracaná Cuello Dorado | Ara auricollis | Yellow-collared Macaw | Psittacidae | Psittaciformes | SinFicha |
| 347 | Maracaná Lomo Rojo | Ara maracana | Blue-winged Macaw | Psittacidae | Psittaciformes | SinFicha |
| 458 | Martín Pescador Chico | Chloroceryle americana | Green Kingfisher | Alcedinidae | Coraciiformes | SinFicha |
| 459 | Martín Pescador Enano | Chloroceryle aenea | American Pygmy Kingfisher | Alcedinidae | Coraciiformes | SinFicha |
| 456 | Martín Pescador Grande | Ceryle torquata | Ringed Kingfisher | Alcedinidae | Coraciiformes | SinFicha |
| 457 | Martín Pescador Mediano | Chloroceryle amazona | Amazon Kingfisher | Alcedinidae | Coraciiformes | SinFicha |
| 23 | Martineta Chaqueña | Eudromia formosa | Quebracho Crested Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 22 | Martineta Común | Eudromia elegans | Elegant Crested Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 194 | Matamico Andino | Phalcoboenus megalopterus | Mountain Caracara | Falconidae | Falconiformes | SinFicha |
| 195 | Matamico Blanco | Phalcoboenus albogularis | White-throated Caracara | Falconidae | Falconiformes | SinFicha |
| 196 | Matamico Grande | Phalcoboenus australis | Striated Caracara | Falconidae | Falconiformes | SinFicha |
| 964 | Matico | Icterus icterus | Venezuelan Troupial | Icteridae | Passeriformes | SinFicha |
| 827 | Mielero | Coereba flaveola | Bananaquit | Coerebidae | Passeriformes | SinFicha |
| 157 | Milano Blanco | Elanus leucurus | White-tailed Kite | Accipitridae | Falconiformes | SinFicha |
| 158 | Milano Boreal | Ictinia mississippiensis | Mississippi Kite | Accipitridae | Falconiformes | SinFicha |
| 164 | Milano Cabeza Gris | Leptodon cayanensis | Gray-headed Kite | Accipitridae | Falconiformes | SinFicha |
| 172 | Milano Chico | Gampsonyx swainsonii | Pearl Kite | Accipitridae | Falconiformes | SinFicha |
| 173 | Milano de Corbata | Harpagus diodon | Rufous-thighed Kite | Accipitridae | Falconiformes | SinFicha |
| 163 | Milano Pico Garfio | Chondrohierax uncinatus | Hook-billed Kite | Accipitridae | Falconiformes | SinFicha |
| 159 | Milano Plomizo | Ictinia plumbea | Plumbeous Kite | Accipitridae | Falconiformes | SinFicha |
| 156 | Milano Tijereta | Elanoides forficatus | Swallow-tailed Kite | Accipitridae | Falconiformes | SinFicha |
| 86 | Mirasol Chico | Ixobrychus exilis | Least Bittern | Ardeidae | Ciconiiformes | SinFicha |
| 85 | Mirasol Común | Ixobrychus involucris | Stripe-backed Bittern | Ardeidae | Ciconiiformes | SinFicha |
| 84 | Mirasol Grande | Botaurus pinnatus | Pinnated Bittern | Ardeidae | Ciconiiformes | SinFicha |
| 785 | Mirlo de Agua | Cinclus schulzi | Rufous-throated Dipper | Cinclidae | Passeriformes | SinFicha |
| 902 | Misto | Sicalis luteola | Grassland Yellow-Finch | Emberizidae | Passeriformes | SinFicha |
| 654 | Monjita Blanca | Xolmis irupero | White Monjita | Tyrannidae | Passeriformes | SinFicha |
| 649 | Monjita Castaña | Neoxolmis rubetra | Rusty-backed Monjita | Tyrannidae | Passeriformes | SinFicha |
| 648 | Monjita Chocolate | Neoxolmis rufiventris | Chocolate-vented Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 653 | Monjita Coronada | Xolmis coronata | Black-crowned Monjita | Tyrannidae | Passeriformes | SinFicha |
| 651 | Monjita Dominica/Overa | Heteroxolmis dominicana | Black-and-white Monjita | Tyrannidae | Passeriformes | SinFicha |
| 652 | Monjita Gris | Xolmis cinerea | Gray Monjita | Tyrannidae | Passeriformes | SinFicha |
| 650 | Monjita Salinera | Neoxolmis salinarum | Salinas Monjita | Tyrannidae | Passeriformes | SinFicha |
| 937 | Monterita Cabeza Negra | Poospiza melanoleuca | Black-capped Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 931 | Monterita Canela | Poospiza ornata | Cinnamon Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 932 | Monterita Ceja Rojiza | Poospiza erythrophrys | Rusty-browed Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 936 | Monterita de Collar | Poospiza torquata | Ringed Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 934 | Monterita Litoraleña | Poospiza lateralis | Red-rumped Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 933 | Monterita Pecho Gris | Poospiza hypochondria | Rufous-sided Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 922 | Monterita Serrana | Compsospiza baeri | Tucuman Mountain-Finch | Emberizidae | Passeriformes | SinFicha |
| 710 | Mosqueta Boreal | Empidonax alnorum | Alder Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 725 | Mosqueta Cabeza Canela | Todirostrum plumbeiceps | Ochre-faced Tody-Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 728 | Mosqueta Cara Canela | Phylloscartes sylviolus | Bay-ringed Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 689 | Mosqueta Ceja Amarilla | Capsiempis flaveola | Yellow Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 711 | Mosqueta Ceja Blanca | Cnemotriccus fuscatus | Fuscous Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 730 | Mosqueta Común | Phylloscartes ventralis | Mottle-cheeked Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 764 | Mosqueta Corona Gris | Phyllomyias sclateri | Sclater's Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 763 | Mosqueta Corona Oliva | Phyllomyias virescens | Greenish Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 759 | Mosqueta Corona Parda | Leptopogon amaurocephalus | Sepia-capped Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 723 | Mosqueta de Anteojos | Hemitriccus diops | Drab-breasted Bamboo-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 766 | Mosqueta Enana | Myiornis auricularis | Eared Pygmy-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 718 | Mosqueta Estriada | Myiophobus fasciatus | Bran-colored Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 727 | Mosqueta Media Luna | Phylloscartes eximius | Southern Bristle-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 726 | Mosqueta Ojo Dorado | Todirostrum margaritaceiventer | Golden-eye Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 724 | Mosqueta Ojo Grande | Hemitriccus obsoletus | Brown-breasted Bamboo-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 762 | Mosqueta Olivácea | Phyllomyias fasciatus | Planalto Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 729 | Mosqueta Oreja Negra | Phylloscartes paulistus | Sao Paulo Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 709 | Mosqueta Parda | Empidonax euleri | Brown Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 761 | Mosqueta Pico Curvo | Phyllomyias burmeisteri | Rough-legged Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 714 | Mosquitero | Corythopis delalandi | Southern Antpipit | Tyrannidae | Passeriformes | SinFicha |
| 209 | Muitú | Crax fasciolata | Bare-faced Curassow | Cracidae | Galliformes | SinFicha |
| 855 | Naranjero | Thraupis bonariensis | Blue-and-yellow Tanager | Thraupidae | Passeriformes | SinFicha |
| 942 | Negrillo | Carduelis atrata | Black Siskin | Fringillidae | Passeriformes | SinFicha |
| 249 | Ostrero Austral | Haematopus leucopodus | Magellanic Oystercatcher | Haematopodidae | Charadriiformes | SinFicha |
| 248 | Ostrero Común | Haematopus palliatus | American Oystercatcher | Haematopodidae | Charadriiformes | SinFicha |
| 250 | Ostrero Negro | Haematopus ater | Blackish Oystercatcher | Haematopodidae | Charadriiformes | SinFicha |
| 66 | Paíño Cara Blanca | Pelagodroma marina | White-faced Storm-Petrel | Hydrobatidae | Procellariiformes | SinFicha |
| 63 | Paíño Común | Oceanites oceanicus | Wilson's Storm-Petrel | Hydrobatidae | Procellariiformes | SinFicha |
| 62 | Paíño Gris | Garrodia nereis | Gray-backed Storm-Petrel | Hydrobatidae | Procellariiformes | SinFicha |
| 65 | Paíño Vientre Blanco | Fregetta grallaria | White-bellied Storm-Petrel | Hydrobatidae | Procellariiformes | SinFicha |
| 64 | Paiño Vientre Negro | Fregetta tropica | Black-bellied Storm-Petrel | Hydrobatidae | Procellariiformes | SinFicha |
| 539 | Pajonalera Pico Curvo | Limnornis curvirostris | Curve-billed Reedhaunter | Furnaridae | Passeriformes | SinFicha |
| 540 | Pajonalera Pico Recto | Limnoctites rectirostris | Straight-billed Reedhaunter | Furnaridae | Passeriformes | SinFicha |
| 321 | Paloma Araucana | Columba araucana | Chilean Pigeon | Columbidae | Columbiformes | SinFicha |
| 323 | Paloma Colorada | Columba cayennensis | Pale-vented Pigeon | Columbidae | Columbiformes | SinFicha |
| 327 | Paloma Doméstica | Columba livia | Rock Pigeon | Columbidae | Columbiformes | SinFicha |
| 326 | Paloma Manchada | Columba maculosa | Spot-winged Pigeon | Columbidae | Columbiformes | SinFicha |
| 340 | Paloma Montera Castaña | Geotrygon montana | Ruddy Quail-Dove | Columbidae | Columbiformes | SinFicha |
| 341 | Paloma Montera Grande | Geotrygon frenata | White-throated Quail-Dove | Columbidae | Columbiformes | SinFicha |
| 342 | Paloma Montera Violácea | Geotrygon violacea | Violaceous Quail-Dove | Columbidae | Columbiformes | SinFicha |
| 322 | Paloma Nuca Blanca | Columba fasciata | Band-tailed Pigeon | Columbidae | Columbiformes | SinFicha |
| 325 | Paloma Picazuró | Columba picazuro | Picazuro Pigeon | Columbidae | Columbiformes | SinFicha |
| 324 | Paloma Trocal | Columba speciosa | Scaled Pigeon | Columbidae | Columbiformes | SinFicha |
| 294 | Paloma-Antártica | Chionis alba | Snowy Sheathbill | Thinocoridae | Charadriiformes | SinFicha |
| 343 | Palomita Azulada | Claravis pretiosa | Blue Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 333 | Palomita Cordillerana | Metriopelia melanoptera | Black-winged Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 334 | Palomita Dorada | Metriopelia aymara | Golden-spotted Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 344 | Palomita Morada | Claravis godefrida | Purple-winged Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 336 | Palomita Moteada | Metriopelia ceciliae | Bare-faced Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 335 | Palomita Ojo Desnudo | Metriopelia morenoi | Bare-eyed Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 52 | Pardela Boreal | Puffinus puffinus | Manx Shearwater | Procellaridae | Procellariiformes | SinFicha |
| 48 | Pardela Cabeza Negra | Puffinus gravis | Greater Shearwater | Procellaridae | Procellariiformes | SinFicha |
| 53 | Pardela Chica | Puffinus assimilis | Little Shearwater | Procellaridae | Procellariiformes | SinFicha |
| 47 | Pardela Grande | Calonectris diomedea | Cory's Shearwater | Procellaridae | Procellariiformes | SinFicha |
| 43 | Pardela Oscura | Puffinus griseus | Sooty Shearwater | Procellaridae | Procellariiformes | SinFicha |
| 108 | Parina Chica | Phoenicoparrus jamesi | Puna Flamingo | Phoenicopteridae | Phoenicopteriformes | SinFicha |
| 107 | Parina Grande | Phoenicoparrus andinus | Andean Flamingo | Phoenicopteridae | Phoenicopteriformes | SinFicha |
| 127 | Pato Barcino | Anas flavirostris | Speckled Teal | Anatidae | Anseriformes | SinFicha |
| 144 | Pato Cabeza Negra | Heteronetta atricapilla | Black-headed Duck | Anatidae | Anseriformes | SinFicha |
| 133 | Pato Capuchino | Anas versicolor | Silver Teal | Anatidae | Anseriformes | SinFicha |
| 141 | Pato Castaño | Netta erythrophthalma | Southern Pochard | Anatidae | Anseriformes | SinFicha |
| 130 | Pato Colorado | Anas cyanoptera | Cinnamon Teal | Anatidae | Anseriformes | SinFicha |
| 123 | Pato Crestón | Lophonetta specularioides | Bellied Duck | Anatidae | Anseriformes | SinFicha |
| 111 | Pato Crestudo | Sarkidiornis melanotos | Comb Duck | Anatidae | Anseriformes | SinFicha |
| 128 | Pato Cuchara | Anas platalea | Red Shoveler | Anatidae | Anseriformes | SinFicha |
| 142 | Pato Cutirí | Amazonetta brasiliensis | Brazilian Teal | Anatidae | Anseriformes | SinFicha |
| 124 | Pato de Anteojos | Anas specularis | Spectacled Duck | Anatidae | Anseriformes | SinFicha |
| 143 | Pato de Collar | Callonetta leucophrys | Ringed Teal | Anatidae | Anseriformes | SinFicha |
| 134 | Pato de Torrente | Merganetta armata | Torrent Duck | Anatidae | Anseriformes | SinFicha |
| 147 | Pato Fierro | Oxyura dominica | Masked Duck | Anatidae | Anseriformes | SinFicha |
| 131 | Pato Gargantilla | Anas bahamensis | White-cheeked Pintail | Anatidae | Anseriformes | SinFicha |
| 126 | Pato Maicero | Anas georgica | Yellow-billed Pintail | Anatidae | Anseriformes | SinFicha |
| 129 | Pato Media Luna | Anas discors | Blue-winged Teal | Anatidae | Anseriformes | SinFicha |
| 125 | Pato Overo | Anas sibilatrix | Chiloe Wigeon | Anatidae | Anseriformes | SinFicha |
| 140 | Pato Picazo | Netta peposaca | Rosy-billed Pochard | Anatidae | Anseriformes | SinFicha |
| 132 | Pato Puneño | Anas puna | Puna Teal | Anatidae | Anseriformes | SinFicha |
| 110 | Pato Real | Cairina moschata | Muscovy Duck | Anatidae | Anseriformes | SinFicha |
| 135 | Pato Serrucho | Mergus octosetaceus | Brazilian Merganser | Anatidae | Anseriformes | SinFicha |
| 146 | Pato Zambullidor Chico | Oxyura vittata | Lake Duck | Anatidae | Anseriformes | SinFicha |
| 145 | Pato Zambullidor Grande | Oxyura ferruginea | Andean Duck | Anatidae | Anseriformes | SinFicha |
| 214 | Pava de Monte Alisera | Penelope dabbenei | Red-faced Guan | Cracidae | Galliformes | SinFicha |
| 212 | Pava de Monte Común | Penelope obscura | Dusky-legged Guan | Cracidae | Galliformes | SinFicha |
| 829 | Payador Canela | Diglossa sittoides | Rusty Flowerpiercer | Coerebidae | Passeriformes | SinFicha |
| 626 | Pájaro Campana | Procnias nudicollis | Bare-throated Bellbird | Cotingidae | Passeriformes | SinFicha |
| 967 | Pecho Amarillo Común | Pseudoleistes virescens | Brown-and-yellow Marshbird | Icteridae | Passeriformes | SinFicha |
| 966 | Pecho Amarillo Grande | Pseudoleistes guirahuro | Yellow-rumped Marshbird | Icteridae | Passeriformes | SinFicha |
| 971 | Pecho Colorado | Sturnella superciliaris | White-browed Blackbird | Icteridae | Passeriformes | SinFicha |
| 930 | Pepitero Chico | Saltatricula multicolor | Many-colored Chaco-Finch | Emberizidae | Passeriformes | SinFicha |
| 861 | Pepitero Colorado | Saltator rufiventris | Rufous-bellied Saltator | Emberizidae | Passeriformes | SinFicha |
| 860 | Pepitero de Collar | Saltator aurantiirostris | Golden-billed Saltator | Emberizidae | Passeriformes | SinFicha |
| 864 | Pepitero Gris | Saltator coerulescens | Grayish Saltator | Emberizidae | Passeriformes | SinFicha |
| 865 | Pepitero Negro | Pitylus fuliginosus | Black-throated Grosbeak | Emberizidae | Passeriformes | SinFicha |
| 863 | Pepitero Picudo | Saltator maxillosus | Thick-billed Saltator | Emberizidae | Passeriformes | SinFicha |
| 862 | Pepitero Verdoso | Saltator similis | Green-winged Saltator | Emberizidae | Passeriformes | SinFicha |
| 56 | Petrel Antártico | Thalassoica antartica | Antarctic Prion | Procellaridae | Procellariiformes | SinFicha |
| 58 | Petrel Azulado | Halobaena caerulea | Blue Petrel | Procellaridae | Procellariiformes | SinFicha |
| 42 | Petrel Barba Blanca | Procellaria aequinoctialis | White-chinned Petrel | Procellaridae | Procellariiformes | SinFicha |
| 57 | Petrel Blanco | Pagodroma nivea | Snow Petrel | Procellaridae | Procellariiformes | SinFicha |
| 50 | Petrel Cabeza Blanca | Pterodroma lessonii | White-headed Petrel | Procellaridae | Procellariiformes | SinFicha |
| 45 | Petrel Cabeza Parda | Pterodroma incerta | Atlantic Petrel | Procellaridae | Procellariiformes | SinFicha |
| 54 | Petrel Ceniciento | Procellaria cinerea | Gray Petrel | Procellaridae | Procellariiformes | SinFicha |
| 51 | Petrel Collar Gris | Pterodroma mollis | Soft-plumaged Petrel | Procellaridae | Procellariiformes | SinFicha |
| 49 | Petrel Damero | Daption capense | Cape Petrel | Procellaridae | Procellariiformes | SinFicha |
| 40 | Petrel Gigante Común | Macronectes giganteus | Antarctic Giant Petrel | Procellaridae | Procellariiformes | SinFicha |
| 41 | Petrel Gigante Oscuro | Macronectes halli | Hall's Giant Petrel | Procellaridae | Procellariiformes | SinFicha |
| 46 | Petrel Negro | Procellaria westlandica | Westland Petrel | Procellaridae | Procellariiformes | SinFicha |
| 44 | Petrel pizarra | Ptetodroma brevirostris | Kerguelen Petrel | Procellaridae | Procellariiformes | SinFicha |
| 55 | Petrel Plateado | Fulmarus glacialoides | Southern Fulmar | Procellaridae | Procellariiformes | SinFicha |
| 757 | Peutrén | Colorhamphus parvirostris | Patagonian Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 687 | Picabuey | Machetornis rixosus | Cattle Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 450 | Picaflor Amatista | Calliphlox amethystina | Amethyst Woodstar | Trochilidae | Trochiliformes | SinFicha |
| 428 | Picaflor Andino | Oreotrochilus leucopleurus | White-sided Hillstar | Trochilidae | Trochiliformes | SinFicha |
| 445 | Picaflor Bronceado | Hylocharis chrysura | Gilded Sapphire | Trochilidae | Trochiliformes | SinFicha |
| 446 | Picaflor Cola Castaña | Hylocharis sapphirina | Rufous-throated Sapphire | Trochilidae | Trochiliformes | SinFicha |
| 430 | Picaflor Colorado | Oreotrochilus adela | Wedge-tailed Hillstar | Trochilidae | Trochiliformes | SinFicha |
| 444 | Picaflor Común | Chlorostilbon aureoventris | Glittering-bellied Emerald | Trochilidae | Trochiliformes | SinFicha |
| 426 | Picaflor Cometa | Sappho sparganura | Red-tailed Comet | Trochilidae | Trochiliformes | SinFicha |
| 443 | Picaflor Copetón | Stephanoxis lalandi | Plovercrest | Trochilidae | Trochiliformes | SinFicha |
| 439 | Picaflor Corona Violácea | Thalurania glaucopis | Violet-capped Woodnymph | Trochilidae | Trochiliformes | SinFicha |
| 447 | Picaflor de Antifaz | Polytmus guainumbi | White-tailed Goldenthroat | Trochilidae | Trochiliformes | SinFicha |
| 431 | Picaflor de Barbijo | Heliomaster furcifer | Blue-tufted Starthroat | Trochilidae | Trochiliformes | SinFicha |
| 451 | Picaflor Enano | Microstilbon burmeisteri | Slender-tailed Woodstar | Trochilidae | Trochiliformes | SinFicha |
| 448 | Picaflor Esmeralda | Amazilia versicolor | Versicolored Emerald | Trochilidae | Trochiliformes | SinFicha |
| 441 | Picaflor Frente Azul | Eriocnemis glaucopoides | Blue-capped Puffleg | Trochilidae | Trochiliformes | SinFicha |
| 436 | Picaflor Garganta Blanca | Leucochloris albicollis | White-throated Hummingbird | Trochilidae | Trochiliformes | SinFicha |
| 452 | Picaflor Gigante | Patagona gigas | Giant Hummingbird | Trochilidae | Trochiliformes | SinFicha |
| 435 | Picaflor Negro | Melanotrochilus fuscus | Black Jacobin | Trochilidae | Trochiliformes | SinFicha |
| 429 | Picaflor Puneño | Oreotrochilus estella | Andean Hillstar | Trochilidae | Trochiliformes | SinFicha |
| 440 | Picaflor Rubí | Sephanoides galeritus | Green-backed Firecrown | Trochilidae | Trochiliformes | SinFicha |
| 437 | Picaflor Vientre Blanco | Amazilia chionogaster | White-bellied Hummingbird | Trochilidae | Trochiliformes | SinFicha |
| 427 | Picaflor Vientre Negro | Anthracothorax nigricollis | Black-throated Mango | Trochilidae | Trochiliformes | SinFicha |
| 442 | Picaflor Yungueño | Adelomyia melanogenys | Speckled Hummingbird | Trochilidae | Trochiliformes | SinFicha |
| 438 | Picaflor Zafiro | Thalurania furcata | Fork-tailed Woodnymph | Trochilidae | Trochiliformes | SinFicha |
| 510 | Picapalo Colorado | Campylorhamphus trochilirostris | Red-billed Scythebill | Dendrocolaptidae | Passeriformes | SinFicha |
| 509 | Picapalo Oscuro | Campylorhamphus falcularius | Black-billed Scythebill | Dendrocolaptidae | Passeriformes | SinFicha |
| 669 | Pico de Plata | Hymenops perspicillatus | Spectacled Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 628 | Picoagudo | Oxyruncus cristatus | Sharpbill | Cotingidae | Passeriformes | SinFicha |
| 719 | Picochato Cabezón | Ramphotrigon megacephala | Large-headed Flatbill | Tyrannidae | Passeriformes | SinFicha |
| 721 | Picochato Chico | Platyrinchus leucoryphus | Russet-winged Spadebill | Tyrannidae | Passeriformes | SinFicha |
| 722 | Picochato Enano | Platyrinchus mystaceus | White-throated Spadebill | Tyrannidae | Passeriformes | SinFicha |
| 720 | Picochato Grande | Tolmomyias sulphurescens | Yellow-olive Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 586 | Picolezna Chico | Xenops minutus | Plain Xenops | Furnaridae | Passeriformes | SinFicha |
| 584 | Picolezna Estriado | Xenops contaminatus | Sharp-billed Treehunter | Furnaridae | Passeriformes | SinFicha |
| 587 | Picolezna Patagónico | Pygarrhichas albogularis | White-throated Treerunner | Furnaridae | Passeriformes | SinFicha |
| 585 | Picolezna Rojizo | Xenops rutilans | Streaked Xenops | Furnaridae | Passeriformes | SinFicha |
| 565 | Pijuí Canela | Poecilurus scutata | Ochre-cheeked Spinetail | Furnaridae | Passeriformes | SinFicha |
| 561 | Pijuí Ceja Canela | Synallaxis superciliosa | Buff-browed Spinetail | Furnaridae | Passeriformes | SinFicha |
| 563 | Pijuí Cola Parda | Synallaxis albescens | Pale-breasted Spinetail | Furnaridae | Passeriformes | SinFicha |
| 564 | Pijuí Corona Rojiza | Synallaxis ruficapilla | Rufous-capped Spinetail | Furnaridae | Passeriformes | SinFicha |
| 562 | Pijuí Frente Gris | Synallaxis frontalis | Sooty-fronted Spinetail | Furnaridae | Passeriformes | SinFicha |
| 567 | Pijuí Negrusco | Synallaxis cinerascens | Gray-bellied Spinetail | Furnaridae | Passeriformes | SinFicha |
| 566 | Pijuí Plomizo | Synallaxis spixi | Chicli Spinetail | Furnaridae | Passeriformes | SinFicha |
| 3 | Pingüino de Barbijo | Pygoscelis antarctica | Chinstrap Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 5 | Pingüino de Vincha | Pygoscelis papua | Gentoo Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 1 | Pingüino Emperador | Aptenodytes forsteri | Emperor Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 6 | Pingüino Frente Dorada | Eudyptes chrysolophus | Macaroni Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 4 | Pingüino Ojo Blanco | Pygoscelis adelia | Adelie Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 8 | Pingüino Patagónico | Spheniscus magellanicus | Magellanic Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 7 | Pingüino Penacho Amarillo | Eudyptes chrysocome | Rockhopper Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 2 | Pingüino Rey | Aptenodytes patagonicus | King Penguin | Spheniscidae | Sphenisciformes | SinFicha |
| 740 | Piojito Común | Serpophaga subcristata | White-crested Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 746 | Piojito de los Pinos | Mecocerculus hellmayri | Buff-banded Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 745 | Piojito Gargantilla | Mecocerculus leucophrys | White-throated Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 739 | Piojito Gris | Serpophaga nigricans | Sooty Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 758 | Piojito Pardo | Phaeomyias murina | Mouse-colored Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 742 | Piojito Picudo | Inezia inornata | Plain Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 760 | Piojito Silbón | Camptostoma obsoletum | Southern Beardless-Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 741 | Piojito Vientre Blanco | Serpophaga munda | White-bellied Tyrannulet | Tyrannidae | Passeriformes | SinFicha |
| 856 | Pioró | Pyrrhocoma ruficeps | Chestnut-headed Tanager | Thraupidae | Passeriformes | SinFicha |
| 71 | Piquero del Cabo | Morus capensis | Cape Gannet | Sulidae | Pelecaniformes | SinFicha |
| 70 | Piquero Pardo | Sula leucogaster | Brown Booby | Sulidae | Pelecaniformes | SinFicha |
| 898 | Piquitodeoro Común | Catamenia analis | Band-tailed Seedeater | Emberizidae | Passeriformes | SinFicha |
| 899 | Piquitodeoro Grande | Catamenia inornata | Plain-colored Seedeater | Emberizidae | Passeriformes | SinFicha |
| 377 | Pirincho | Guira guira | Guira Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 668 | Pitajo Canela | Ochthoeca oenanthoides | D'Orbigny's Chat-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 667 | Pitajo Gris | Ochthoeca leucophrys | White-browed Chat-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 692 | Pitanguá | Megarhynchus pitangua | Boat-billed Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 826 | Pitiayumí | Parula pitiayumi | Tropical Parula | Parulidae | Passeriformes | SinFicha |
| 267 | Pitotoy Chico | Tringa flavipes | Lesser Yellowlegs | Scolopacidae | Charadriiformes | SinFicha |
| 266 | Pitotoy Grande | Tringa melanoleuca | Greater Yellowlegs | Scolopacidae | Charadriiformes | SinFicha |
| 268 | Pitotoy Solitario | Tringa solitaria | Solitary Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 272 | Playerito Blanco | Calidris alba | Sanderling | Scolopacidae | Charadriiformes | SinFicha |
| 270 | Playerito Canela | Tryngites subruficollis | Buff-breasted Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 277 | Playerito Enano | Calidris pusilla | Semipalmated Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 269 | Playerito Manchado | Actitis macularia | Spotted Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 274 | Playerito Pectoral | Calidris melanotos | Pectoral Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 276 | Playerito Rabadilla Blanca | Calidris fuscicollis | White-rumped Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 275 | Playerito Unicolor | Calidris bairdii | Baird's Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 280 | Playero Ala Blanca | Catoptrophorus semipalmatus | Willet | Scolopacidae | Charadriiformes | SinFicha |
| 265 | Playero de Rompiente | Aphriza virgata | Surfbird | Scolopacidae | Charadriiformes | SinFicha |
| 273 | Playero Rojizo | Calidris canutus | Red Knot | Scolopacidae | Charadriiformes | SinFicha |
| 278 | Playero Trinador | Numenius phaeopus | Whimbrel | Scolopacidae | Charadriiformes | SinFicha |
| 286 | Playero Zancudo | Micropalama himantopus | Stilt Sandpiper | Scolopacidae | Charadriiformes | SinFicha |
| 240 | Pollona Azul/*Sultana | Porphyrula martinica | Purple Gallinule | Rallidae | Gruiformes | SinFicha |
| 241 | Pollona Celeste | Porphyrio flavirostris | Azure Gallinule | Rallidae | Gruiformes | SinFicha |
| 239 | Pollona Negra | Gallinula chloropus | Common Moorhen | Rallidae | Gruiformes | SinFicha |
| 242 | Pollona Pintada | Porphyriops melanops | Spot-flanked Gallinule | Rallidae | Gruiformes | SinFicha |
| 61 | Prión Pico Corto | Pachyptila turtur | Fairy Prion | Procellaridae | Procellariiformes | SinFicha |
| 60 | Prión Pico Fino | Pachyptila belcheri | Slender-billed Prion | Procellaridae | Procellariiformes | SinFicha |
| 59 | Prión Pico Grande | Pachyptila desolata | Antarctic Prion | Procellaridae | Procellariiformes | SinFicha |
| 136 | Quetro Austral | Tachyeres pteneres | Flightless Steamerduck | Anatidae | Anseriformes | SinFicha |
| 139 | Quetro Cabeza Blanca | Tachyeres leucocephalus | White-headed Steamerduck | Anatidae | Anseriformes | SinFicha |
| 137 | Quetro Malvinero | Tachyeres brachypterus | Falkland Steamerduck | Anatidae | Anseriformes | SinFicha |
| 138 | Quetro Volador | Tachyeres patachonicus | Flying Steamerduck | Anatidae | Anseriformes | SinFicha |
| 25 | Quiula Patagónica | Tinamotis ingoufi | Patagonian Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 24 | Quiula Puneña | Tinamotis pentlandii | Puna Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 629 | Rara | Phytotoma rara | Rufous-tailed Plantcutter | Phytotomidae | Passeriformes | SinFicha |
| 538 | Raspahojas | Sclerurus scansor | Rufous-breasted Leaftosser | Furnaridae | Passeriformes | SinFicha |
| 788 | Ratona Aperdizada | Cistothorus platensis | Sedge Wren | Troglodytidae | Passeriformes | SinFicha |
| 790 | Ratona Ceja Blanca | Troglodytes solstitialis | Mountain Wren | Troglodytidae | Passeriformes | SinFicha |
| 789 | Ratona Común | Troglodytes aedon | House Wren | Troglodytidae | Passeriformes | SinFicha |
| 787 | Ratona Grande | Campylorhynchus turdinus | Thrush-like Wren | Troglodytidae | Passeriformes | SinFicha |
| 546 | Rayadito | Aphrastura spinicauda | Thorn-tailed Rayadito | Furnaridae | Passeriformes | SinFicha |
| 320 | Rayador | Rynchops niger | Black Skimmer | Rynchopidae | Charadriiformes | SinFicha |
| 877 | Reinamora Chica | Cyanoloxia glaucocaerulea | Glaucous-blue Grosbeak | Emberizidae | Passeriformes | SinFicha |
| 878 | Reinamora Enana | Amaurospiza moesta | Blackish-blue Seedeater | Emberizidae | Passeriformes | SinFicha |
| 876 | Reinamora Grande | Cyanocompsa brissonii | Ultramarine Grosbeak | Emberizidae | Passeriformes | SinFicha |
| 526 | Remolinera Araucana | Cinclodes patagonicus | Dark-bellied Cinclodes | Furnaridae | Passeriformes | SinFicha |
| 527 | Remolinera castaña | Cinclodes atacamensis | White-winged Cinclodes | Furnaridae | Passeriformes | SinFicha |
| 531 | Remolinera Chica | Cinclodes oustaleti | Gray-flanked Cinclodes | Furnaridae | Passeriformes | SinFicha |
| 528 | Remolinera Chocolate | Cinclodes olrgi | Southern Scrub-Flycatcher | Furnaridae | Passeriformes | SinFicha |
| 530 | Remolinera Común | Cinclodes fuscus | Bar-winged Cinclodes | Furnaridae | Passeriformes | SinFicha |
| 525 | Remolinera Negra | Cinclodes antarcticus | Blackish Cinclodes | Furnaridae | Passeriformes | SinFicha |
| 529 | Remolinera Serrana | Cinclodes comechingonus | Comechingones Cinclodes | Furnaridae | Passeriformes | SinFicha |
| 868 | Rey del Bosque | Pheucticus aureoventris | Black-backed Grosbeak | Emberizidae | Passeriformes | SinFicha |
| 830 | Saí Azul | Dacnis cayana | Blue Dacnis | Coerebidae | Passeriformes | SinFicha |
| 828 | Saí Común | Conirostrum speciosum | Chestnut-vented Conebill | Coerebidae | Passeriformes | SinFicha |
| 840 | Saíra Arcoiris | Tangara seledon | Green-headed Tanager | Thraupidae | Passeriformes | SinFicha |
| 841 | Saíra Castaña | Tangara preciosa | Chestnut-backed Tanager | Thraupidae | Passeriformes | SinFicha |
| 851 | Saíra de Antifaz | Pipraeidea melanonota | Fawn-breasted Tanager | Thraupidae | Passeriformes | SinFicha |
| 838 | Saíra Dorada | Hemithraupis guira | Guira Tanager | Thraupidae | Passeriformes | SinFicha |
| 842 | Saíra Pecho Negro | Tangara cayana | Burnished-buff Tanager | Thraupidae | Passeriformes | SinFicha |
| 299 | Salteador Chico | Stercorarius parasiticus | Parasitic Jaeger | Stercorariidae | Charadriiformes | SinFicha |
| 300 | Salteador Coludo | Stercorarius longicaudus | Long-tailed Jaeger | Stercorariidae | Charadriiformes | SinFicha |
| 298 | Salteador Grande | Stercorarius pomarinus | Pomarine Jaeger | Stercorariidae | Charadriiformes | SinFicha |
| 220 | Saracura | Aramides saracura | Slaty-breasted Wood-Rail | Rallidae | Gruiformes | SinFicha |
| 935 | Sietevestidos | Poospiza nigrorufa | Black-and-rufous Warbling-Finch | Emberizidae | Passeriformes | SinFicha |
| 113 | Sirirí Colorado | Dendrocygna bicolor | Fulvous Whistling-Duck | Anatidae | Anseriformes | SinFicha |
| 115 | Sirirí Pampa | Dendrocygna viduata | White-faced Whistling-Duck | Anatidae | Anseriformes | SinFicha |
| 114 | Sirirí Vientre Negro | Dendrocygna autumnalis | Black-bellied Whistling-Duck | Anatidae | Anseriformes | SinFicha |
| 666 | Sobrepuesto Común | Lessonia rufa | Austral Negrito | Tyrannidae | Passeriformes | SinFicha |
| 924 | Soldadito Común | Lophospingus pusillus | Black-crested Finch | Emberizidae | Passeriformes | SinFicha |
| 923 | Soldadito Gris | Lophospingus griseocristatus | Gray-crested Finch | Emberizidae | Passeriformes | SinFicha |
| 688 | Suirirí Amarillo | Satrapa icterophrys | Yellow-browed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 697 | Suirirí Boreal | Tyrannus tyrannus | Eastern Kingbird | Tyrannidae | Passeriformes | SinFicha |
| 713 | Suirirí Común | Suiriri suiriri | Suiriri Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 712 | Suirirí Pico Corto | Sublegatus modestus | Southern Scrub-Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 695 | Suirirí Real | Tyrannus melancholicus | Tropical Kingbird | Tyrannidae | Passeriformes | SinFicha |
| 698 | Suirirí Silbón | Sirystes sibilator | Sirystes | Tyrannidae | Passeriformes | SinFicha |
| 453 | Surucuá Amarillo | Trogon rufus | Black-throated Trogon | Trogonidae | trogoniformes | SinFicha |
| 455 | Surucuá Aurora | Trogon curucui | Blue-crowned Trogon | Trogonidae | trogoniformes | SinFicha |
| 454 | Surucuá Común | Trogon surrucura | Surucua Trogon | Trogonidae | trogoniformes | SinFicha |
| 732 | Tachurí Canela | Polystictus pectoralis | Bearded Tachuri | Tyrannidae | Passeriformes | SinFicha |
| 733 | Tachurí Coludo | Culicivora caudacuta | Sharp-tailed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 686 | Tachurí Sietecolores | Tachuris rubrigastra | Many-colored Rush-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 537 | Tacuarero | Clibanornis dendrocolaptoides | Canebrake Groundcreeper | Furnaridae | Passeriformes | SinFicha |
| 813 | Tacuarita Azul | Polioptila dumicola | Masked Gnatcatcher | Polioptilidae | Passeriformes | SinFicha |
| 814 | Tacuarita Blanca | Polioptila lactea | Creamy-bellied Gnatcatcher | Polioptilidae | Passeriformes | SinFicha |
| 174 | Taguató común | Buteo magnirostris | Roadside Hawk | Accipitridae | Falconiformes | SinFicha |
| 175 | Taguató Negro | Buteo leucorrhous | White-rumped Hawk | Accipitridae | Falconiformes | SinFicha |
| 836 | Tangará Alcalde | Euphonia pectoralis | Chestnut-bellied Euphonia | Thraupidae | Passeriformes | SinFicha |
| 857 | Tangará Alisero | Thlypopsis ruficeps | Rust-and-yellow Tanager | Thraupidae | Passeriformes | SinFicha |
| 835 | Tangará Amarillo | Euphonia violacea | Violaceous Euphonia | Thraupidae | Passeriformes | SinFicha |
| 837 | Tangará Bonito | Chlorophonia cyanea | Blue-naped Chlorophonia | Thraupidae | Passeriformes | SinFicha |
| 833 | Tangará Cabeza Celeste | Euphonia cyanocephala | Golden-rumped Euphonia | Thraupidae | Passeriformes | SinFicha |
| 834 | Tangará Común | Euphonia chlorotica | Purple-throated Euphonia | Thraupidae | Passeriformes | SinFicha |
| 858 | Tangará Gris | Thlypopsis sordida | Orange-headed Tanager | Thraupidae | Passeriformes | SinFicha |
| 832 | Tangará Picudo | Euphonia chalybea | Green-chinned Euphonia | Thraupidae | Passeriformes | SinFicha |
| 101 | Tapicurú | Mesembrinibis cayannensis | Green Ibis | Threskiornithidae | Ciconiiformes | SinFicha |
| 512 | Tarefero | Sittasomus griseicapillus | Olivaceous Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 14 | Tataupá Chico | Crypturellus parvirostris | Small-billed Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 13 | Tataupá Común | Crypturellus tataupa | Tataupa Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 11 | Tataupá Listado | Crypturellus undulatus | Undulated Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 12 | Tataupá Rojizo | Crypturellus obsoletus | Brown Tinamou | Tinamidae | Tinamiformes | SinFicha |
| 253 | Tero Común | Vanellus chilensis | Southern Lapwing | Chararidriidae | Charadriiformes | SinFicha |
| 252 | Tero real | Himantopus melanurus | White-backed Stilt | Recurvirostridae | Charadriiformes | SinFicha |
| 254 | Tero Serrano | Vanellus resplendens | Andean Lapwing | Chararidriidae | Charadriiformes | SinFicha |
| 831 | Tersina | Tersina viridis | Swallow-Tanager | Tersinidae | Passeriformes | SinFicha |
| 627 | Tesorito | Phibalura flavirostris | Swallow-tailed Cotinga | Cotingidae | Passeriformes | SinFicha |
| 589 | Ticotico Cabeza Negra | Philydor atricapillus | Black-capped Foliage-gleaner | Furnaridae | Passeriformes | SinFicha |
| 583 | Ticotico Ceja Blanca | Anabacerthia amaurotis | White-browed Foliage-gleaner | Furnaridae | Passeriformes | SinFicha |
| 582 | Ticotico Común | Syndactyla rufosuperciliata | Buff-browed Foliage-gleaner | Furnaridae | Passeriformes | SinFicha |
| 588 | Ticotico Grande | Philydor rufus | Buff-fronted Foliage-gleaner | Furnaridae | Passeriformes | SinFicha |
| 590 | Ticotico Ocráceo | Philydor lichtensteini | Ochre-breasted Foliage-gleaner | Furnaridae | Passeriformes | SinFicha |
| 581 | Ticotico Ojo Blanco | Automolus leucophthalmus | White-eyed Foliage-gleaner | Furnaridae | Passeriformes | SinFicha |
| 696 | Tijereta | Tyrannus savana | Fork-tailed Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 642 | Tijerilla | Xenopsaris albinucha | White-naped Xenopsaris | Tyrannidae | Passeriformes | SinFicha |
| 606 | Tiluchi Ala Roja | Herpsilochmus rufimarginatus | Rufous-winged Antwren | Formicariidae | Passeriformes | SinFicha |
| 604 | Tiluchi Colorado | Drymophila rubricollis | Bertoni's Antbird | Formicariidae | Passeriformes | SinFicha |
| 608 | Tiluchi Enano | Terenura maculata | Streak-capped Antwren | Formicariidae | Passeriformes | SinFicha |
| 605 | Tiluchi Estriado | Drymophila malura | Dusky-tailed Antbird | Formicariidae | Passeriformes | SinFicha |
| 607 | Tiluchi Plomizo | Herpsilochmus pileatus | Pileated Antwren | Formicariidae | Passeriformes | SinFicha |
| 381 | Tingazú | Squirrel Cuckoo/Piaya cayana | Squirrel Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 330 | Torcacita Colorada | Columbina talpacoti | Ruddy Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 329 | Torcacita Común | Columbina picui | Picui Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 331 | Torcacita Enana | Columbina minuta | Plain-breasted Ground-Dove | Columbidae | Columbiformes | SinFicha |
| 332 | Torcacita Escamada | Columbina squammata | Scaled Dove | Columbidae | Columbiformes | SinFicha |
| 328 | Torcaza | Zenaida auriculata | Eared Dove | Columbidae | Columbiformes | SinFicha |
| 965 | Tordo Amarillo | Xanthopsar flavus | Saffron-cowled Blackbird | Icteridae | Passeriformes | SinFicha |
| 954 | Tordo Gigante | Scaphidura oryzivora | Giant Cowbird | Icteridae | Passeriformes | SinFicha |
| 959 | Tordo Músico | Molothrus badius | Bay-winged Cowbird | Icteridae | Passeriformes | SinFicha |
| 955 | Tordo Patagónico | Curaeus curaeus | Austral Blackbird | Icteridae | Passeriformes | SinFicha |
| 957 | Tordo Pico Corto | Molothrus rufoaxillaris | Screaming Cowbird | Icteridae | Passeriformes | SinFicha |
| 958 | Tordo Renegrido | Molothrus bonariensis | Shiny Cowbird | Icteridae | Passeriformes | SinFicha |
| 610 | Tovaca Colorada | Chamaeza ruficauda | Brazilian Antthrush | Formicariidae | Passeriformes | SinFicha |
| 609 | Tovaca Común | Chamaeza campanisona | Short-tailed Antthrush | Formicariidae | Passeriformes | SinFicha |
| 504 | Trepador Colorado | Dendrocolaptes picumnus | Black-banded Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 502 | Trepador Garganta Blanca | Xiphocolaptes albicollis | White-throated Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 501 | Trepador Gigante | Xiphocolaptes major | Great Rufous Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 503 | Trepador Oscuro | Dendrocolaptes platyrostris | Planalto Woodcreeper | Dendrocolaptidae | Passeriformes | SinFicha |
| 466 | Tucán Grande | Rhamphastos toco | Great Toucan | Ramphastidae | Piciformes | SinFicha |
| 465 | Tucán Pico Verde | Rhamphastos dicolorus | Keel-billed Toucan | Ramphastidae | Piciformes | SinFicha |
| 641 | Tueré Chico | Tityra inquisitor | Black-crowned Tityra | Tyrannidae | Passeriformes | SinFicha |
| 640 | Tueré Grande | Tityra cayana | Black-tailed Tityra | Tyrannidae | Passeriformes | SinFicha |
| 683 | Tuquito Chico | Legatus leucophaius | Piratic Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 700 | Tuquito Gris | Empidonomus aurantioatrocristatus | Crowned Slaty-Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 681 | Tuquito Rayado | Empidonomus varius | Variegated Flycatcher | Tyrannidae | Passeriformes | SinFicha |
| 95 | Tuyuyú | Mycteria americana | Wood Stork | Ciconidae | Ciconiiformes | SinFicha |
| 215 | Urú | Odontophorus capueira | Spot-winged Wood-Quail | Phasianidae | Galliformes | SinFicha |
| 783 | Urraca Azul | Cyanocorax caeruleus | Azure Jay | Corvidae | Passeriformes | SinFicha |
| 784 | Urraca Común | Cyanocorax chrysops | Plush-crested Jay | Corvidae | Passeriformes | SinFicha |
| 782 | Urraca Morada | Cyanocorax cyanomelas | Purplish Jay | Corvidae | Passeriformes | SinFicha |
| 401 | Urutaú Coludo | Nyctibius aethereus | Long-tailed Potoo | Nyctibiidae | Caprimulgiformes | SinFicha |
| 400 | Urutaú Común | Nyctibius griseus | Common Potoo | Nyctibiidae | Caprimulgiformes | SinFicha |
| 962 | Varillero Ala Amarilla | Agelaius thilius | Yellow-winged Blackbird | Icteridae | Passeriformes | SinFicha |
| 961 | Varillero Congo | Agelaius ruficapillus | Chestnut-capped Blackbird | Icteridae | Passeriformes | SinFicha |
| 960 | Varillero Negro | Agelaius cyanopus | Unicolored Blackbird | Icteridae | Passeriformes | SinFicha |
| 422 | Vencejo Blanco | Aeronautes andecolus | Andean Swift | Apodidae | Apodiformes | SinFicha |
| 421 | Vencejo Chico | Chaetura cinereiventris | Gray-rumped Swift | Apodidae | Apodiformes | SinFicha |
| 417 | Vencejo de Cascada | Cypseloides senex | Great Dusky Swift | Apodidae | Apodiformes | SinFicha |
| 416 | Vencejo de Collar | Streptoprocne zonaris | White-collared Swift | Apodidae | Apodiformes | SinFicha |
| 420 | Vencejo de Tormenta | Chaetura andrei | Ashy-tailed Swift | Apodidae | Apodiformes | SinFicha |
| 423 | Vencejo Montañes | Aeronautes montivagus | White-tipped Swift | Apodidae | Apodiformes | SinFicha |
| 418 | Vencejo Negruzco | Cypseloides fumigatus | Sooty Swift | Apodidae | Apodiformes | SinFicha |
| 419 | Vencejo Pardo | Cypseloides rothschildi | Rothschild's Swift | Apodidae | Apodiformes | SinFicha |
| 941 | Verdón | Embernagra platensis | Great Pampa-Finch | Emberizidae | Passeriformes | SinFicha |
| 947 | Verderón | Carduelis chloris | European Greenfinch | Fringillidae | Passeriformes | SinFicha |
| 684 | Viudita Blanca | Fluvicola pica | Pied Water-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 680 | Viudita Chaqueña | Knipolegus striaticeps | Cinereous Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 678 | Viudita Chica | Knipolegus hudsoni | Hudson's Black-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 699 | Viudita Coluda | Muscipipra vetula | Shear-tailed Gray Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 676 | Viudita Común | Knipolegus aterrimus | White-winged Black-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 675 | Viudita Copetona | Knipolegus lophotes | Crested Black-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 670 | Viudita de Río | Sayornis nigricans | Black Phoebe | Tyrannidae | Passeriformes | SinFicha |
| 677 | Viudita Pico Celeste | Knipolegus cyanirostris | Blue-billed Black-Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 679 | Viudita Plomiza | Knipolegus signatus | Andean Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 879 | Volatinero | Volatinia jacarina | Blue-black Grassquit | Emberizidae | Passeriformes | SinFicha |
| 271 | Vuelvepiedras | Arenaria interpres | Ruddy Turnstone | Scolopacidae | Charadriiformes | SinFicha |
| 97 | Yabirú | Jabiru mycteria | Jabiru | Ciconidae | Ciconiiformes | SinFicha |
| 213 | Yacupoí | Penelope superciliaris | Rusty-margined Guan | Cracidae | Galliformes | SinFicha |
| 210 | Yacutinga | Aburria jacutinga | Black-fronted Piping-Guan | Cracidae | Galliformes | SinFicha |
| 625 | Yacutoro | Pyroderus scutatus | Red-ruffed Fruitcrow | Cotingidae | Passeriformes | SinFicha |
| 874 | Yal Andino | Melanodera xanthogramma | Yellow-bridled Finch | Emberizidae | Passeriformes | SinFicha |
| 875 | Yal Austral | Melanodera melanodera | Canary-winged Finch | Emberizidae | Passeriformes | SinFicha |
| 920 | Yal Carbonero | Phrygilus carbonarius | Carbonated Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 914 | Yal Chico | Phrygilus plebejus | Ash-breasted Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 911 | Yal Grande | Idiopsar brachyurus | Short-tailed Finch | Emberizidae | Passeriformes | SinFicha |
| 919 | Yal Negro | Phrygilus fruticeti | Mourning Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 912 | Yal Platero | Phrygilus alaudinus | Band-tailed Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 913 | Yal Plomizo | Phrygilus unicolor | Plumbeous Sierra-Finch | Emberizidae | Passeriformes | SinFicha |
| 949 | Yapú | Psarocolius decumanus | Crested Oropendola | Icteridae | Passeriformes | SinFicha |
| 379 | Yasiyateré Chico | Dromococcyx pavoninus | Pavonine Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 378 | Yasiyateré Grande | Dromococcyx phasianellus | Pheasant Cuckoo | Cuculidae | Cuculiformes | SinFicha |
| 339 | Yerutí Colorada | Leptotila rufaxilla | Gray-fronted Dove | Columbidae | Columbiformes | SinFicha |
| 337 | Yerutí Común | Leptotila verreauxi | White-tipped Dove | Columbidae | Columbiformes | SinFicha |
| 338 | Yerutí Yungueña | Leptotila megalura | White-faced Dove | Columbidae | Columbiformes | SinFicha |
| 460 | Yeruvá | Baryphthengus ruficapillus | Rufous-capped Motmot | Momotidae | Coraciiformes | SinFicha |
| 674 | Yetapá Chico | Alectrurus tricolor | Cock-tailed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 673 | Yetapá de Collar | Alectrurus risora | Strange-tailed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 672 | Yetapá Grande | Gubernetes yetapa | Streamer-tailed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 671 | Yetapá Negro | Colonia colonus | Long-tailed Tyrant | Tyrannidae | Passeriformes | SinFicha |
| 67 | Yunco Ceja Blanca | Pelecanoides magellani | Magellanic Diving-Petrel | Pelecanoididae | Procellariiformes | SinFicha |
| 68 | Yunco Común | Pelecanoides urinatrix | Common Diving-Petrel | Pelecanoididae | Procellariiformes | SinFicha |
| 69 | Yunco Geórgico | Pelecanoides georgicus | South Georgia Diving-Petrel | Pelecanoididae | Procellariiformes | SinFicha |
| 803 | Zorzal Chalchalero | Turdus amaurochalinus | Creamy-bellied Thrush | Turdidae | Passeriformes | SinFicha |
| 809 | Zorzal Chiguanco | Turdus chiguanco | Chiguanco Thrush | Turdidae | Passeriformes | SinFicha |
| 807 | Zorzal Collar Blanco | Turdus albicollis | White-necked Thrush | Turdidae | Passeriformes | SinFicha |
| 805 | Zorzal Colorado | Turdus rufiventris | Rufous-bellied Thrush | Turdidae | Passeriformes | SinFicha |
| 810 | Zorzal Negro | Turdus serranus | Glossy-black Thrush | Turdidae | Passeriformes | SinFicha |
| 806 | Zorzal Patagónico | Turdus falcklandii | Austral Thrush | Turdidae | Passeriformes | SinFicha |
| 808 | Zorzal Plomizo | Turdus nigriceps | Andean Slaty-Thrush | Turdidae | Passeriformes | SinFicha |
| 804 | Zorzal Sabiá | Turdus leucomelas | Pale-breasted Thrush | Turdidae | Passeriformes | SinFicha |
| 812 | Zorzalito Boreal | Catharus ustulatus | Swainson's Thrush | Turdidae | Passeriformes | SinFicha |
| 811 | Zorzalito Overo | Catharus dryas | Spotted Nightingale-Thrush | Turdidae | Passeriformes | SinFicha |