| Common Name | Latin Name |
| Tamaulipas Crow | Corvus imparatus |
| Tanimbar Cockatoo | Cacatua sanguinea |
| Tasmanian Rosella | Platycercus caledonicus |
| Tataupa Tinamou | Crypturellus tataupa |
| Taveta Golden Weaver | Ploceus castaneiceps |
| Tawny Eagle | Aquila rapax rapax |
| Tawny Frogmouth | Podargus strigoides |
| Tawny Owl | Strix aluco |
| Tawny-breasted Tinamou | Nothocercus julius |
| Tawny-shouldered Blackbird | Agelaius humeralis |
| Temminck’s Stint | Calidris temminckii |
| Tennessee Warbler | Vermivora peregrina |
| Terek Sandpiper | Xenus cinereus |
| Thayer’s Gull | Larus thayeri |
| Thick-billed Ground Pigeon | Trugon terrestris |
| Thick-billed Kingbird | Tyrannus crassirostris |
| Thick-billed Murre | Uria lomula |
| Thick-billed Murre | Uria lomvia |
| Thick-billed Parrot | Rhynchopsitta pachyrhyncha pachyrhyncha |
| Thick-billed Parrot | Rhynchopsitta pachyrhyncha |
| Thick-billed Vireo | Vireo crassirostris |
| Thicket Tinamou | Crypturellus cinnamomeu |
| Three-toed Woodpecker | Picoides tridactylus |
| Timneh African Grey | Psittacus erithacus timneh |
| Timor Cockatoo | Cacatua sulphurea parvula |
| Toco Toucan | Ramphastos toco |
| Torresian Imperial-Pigeon | Ducula spilorrhoa |
| Toulouse Goose | Anser anser |
| Tovi Parrot | Brotogeris jugularis |
| Townsend’s Solitaire | Myadestes townsendi |
| Townsend’s Warbler | Dendroica townsendi |
| Tree Pipit | Anthus trivialis |
| Tree Swallow | Tachycineta bicolor |
| Tres Marias Amazon | Amazona oratrix tresmariae |
| Triangular-spotted Pigeon | Columba guinea |
| Tricolored Blackbird | Agelaius tricolor |
| Tricolored Heron | Egretta tricolor |
| Tri-colored Nun Finch | Erythrura tricolor tricolor |
| Triton Cockatoo | Cacatua galerita triton |
| Tropical Kingbird | Tyrannus melancholicus |
| Tropical Mockingbird | Mimus polyglottos gilvus |
| Tropical Parula | Parula pitiayumi |
| Tropical Screech Owl | Otus choliba |
| Troupial | Icterus icterus icterus |
| Trumpeter | Psophia |
| Trumpeter Hornbill | Ceratogymna bucinator |
| Trumpeter Swan | Cygnus cygnus buccinator |
| Trumpeter Swan | Cygnus buccinator |
| Tucuman Amazon | Amazona tucumana |
| Tufted Duck | Aythya fuligula |
| Tufted Duck | Aythya fuligula |
| Tufted Flycatcher | Mitrephanes phaeocercus |
| Tufted Puffin | Fratercula cirrhata |
| Tufted Puffin | Fratercula cirrhata |
| Tufted Titmouse | Baeolophus bicolor |
| Tui Parakeet | Brotogeris sanctithomae |
| Tundra Swan | Cygnus columbianus |
| Turkey Vulture | Cathartes aura |
| Turkey Vulture | Cathartes aura |
| Turkmenian Eagle Owl | Bubo bubo turcomanus |
| Turquoise Tanager | Tangara mexicana |
| Turquoisine Parakeet | Neophema pulchella |
| Twenty-eight Parakeet | Barnardius zonarius semitorquatus |
| Umbrella Cockatoo | Cacatua alba |
| Undulated Tinamou | Crypturellus undulatus |
| Upland Sandpiper | Bartramia longicauda |
| Ural Owl | Strix uralensis |
| Uvaean Parakeet | Eunymphicus cornutus uvalensis |
| Varied Bunting | Passerina versicolor |
| Varied Thrush | Ixoreus naevius |
| Variegated Flycatcher | Empidonomus varius |
| Vasa Parrot | Coracopsis vasa |
| Vaux’s Swift | Chaetura vauxi |
| Veery | Catharus fuscescens |
| Veraguas Conure | Aratinga pertinax ocularis |
| Verdin | Auriparus flaviceps |
| Vermilion Flycatcher | Pyrocephalus rubinus |
| Vernal Hanging Parrot | Loriculus beryllinus vernalis |
| Verreaux’s Eagle Owl | Bubo lacteus |
| Vesper Sparrow | Pooecetes gramineus |
| Victoria-crowned Pigeon | Goura victoria |
| Vinaceous Amazon | Amazona vinacea |
| Vinous-throated Parrotbill | Paradoxornis webbianus |
| Violaceous Plantain Eater | Musophaga violacea |
| Violaceous Touraco | Musophaga violacea violacea |
| Violet Plantain Eater | Musophaga violacea |
| Violet Touraco | Musophaga violacea |
| Violet-backed Starling | Cinnyricinclus leucogaster |
| Violet-crowned Hummingbird | Amazilia violiceps |
| Violet-green Swallow | Tachycineta thalassina |
| Violet-naped Lory | Eos squamata squamata |
| Violet-necked Lory | Eos squamata |
| Virginia Rail | Rallus limicola |
| Virginia’s Warbler | Vermivora virginiae |
| Vosmaeri Eclectus Parrot | Eclectus roratus vosmaeri |
| Vulturine Guineafowl | Acryllium vulturinum |
| Wagler’s Conure | Aratinga wagleri wagleri |
| Wagler’s Macaw | Ara glaucogularis |
| Waldrapp Ibis | Geronticus eremita |
| Wallace’s Hanging Parrot | Loriculus pusillus flosculus |
| Wandering Albatross | Diomedea exulans |
| Wandering Tattler | Heteroscelus incanus |
| Warbler | Vermivora bachmanii |
| Warbler | Dendroica chrysoparia |
| Warbler | Dendroica kirtlandii |
| Warbling Vireo | Vireo gilvus |
| Wattled Crane | Grus carunculatus |
| Wattled Starling | Creatophora cinerea |
| Weber’s Lorikeet | Trichoglossus haemotodus weberi |
| Weddell’s Conure | Aratinga weddellii |
| Wedge-rumped Storm-Petrel | Oceanodroma tethys |
| Wedge-tailed Shearwater | Puffinus pacificus |
| West African Crowned Crane | Balearica pavonina pavonina |
| West Indian Whistling Duck | Dendrocygna arborea |
| Western Bluebird | Sialia mexicana |
| Western Corella | Cacatua pastinator |
| Western European Roller | Coracias garrulus garrulus |
| Western Grebe | Aechmophorus occidentalis |
| Western Grey Plantain Eater | Crinifer piscator |
| Western Grey Touraco | Crinifer piscator |
| Western Gull | Larus occidentalis |
| Western Kingbird | Tyrannus verticalis |
| Western Long-billed Corella | Cacatua pastinator |
| Western Meadowlark | Sturnella neglecta |
| Western Reef-Heron | Egretta gularis |
| Western Rosella | Platycercus icterotis |
| Western Sandpiper | Calidris mauri |
| Western Screech Owl | Otus kennicotti |
| Western Screech-Owl | Otus kennicottii |
| Western Scrub-Jay | Aphelocoma californica |
| western snowy Plover | Charadrius alexandrinus nivosus |
| Western Tanager | Piranga ludoviciana |
| Western Wood-Pewee | Contopus sordidulus |
| Whale-headed Stork | Balaeniceps rex |
| Whimbrel | Numenius phaeopus |
| Whip-poor-will | Caprimulgus vociferus |
| Whiskered Auklet | Aethia pygmaea |
| Whiskered Auklet | Aethia pygmaea |
| Whiskered Fig Parrot | Psittaculirostris salvadorii |
| Whiskered Lorikeet | Oreopsittacus arfaki |
| Whiskered Screech-Owl | Otus trichopsis |
| Whiskered Tern | Chlidonias hybridus |
| White Cockatoo | Cacatua alba alba |
| White Crowned Pigeon | Columba leucocephala |
| White Ibis | Eudocimus albus |
| White Imperial-Pigeon | Ducula luctuosa |
| White Pelican | Pelecanus onocrotalus |
| White Stork | Ciconia ciconia ciconia |
| White Wagtail | Motacilla alba |
| White-backed Duck | Thalassornis leuconotus |
| White-backed Mousebird | Colius colius |
| White-backed Vulture | Gyps bengalensis |
| White-bellied Bustard | Eupodotis senegalensis |
| White-bellied Caique | Pionites leucogaster |
| White-bellied Go-away Bird | Corythaixoides leucogaster |
| White-bellied Imperial-Pigeon | Ducula forsteni |
| White-bellied Stork | Ciconia abdimii |
| White-breasted Caique | Pionites leucogaster |
| White-breasted Conure | Pyrrhura albipectus |
| White-breasted Cormorant | Phalacrocorax carbo lucidus |
| White-breasted Kingfisher | Halcyon smyrnensis |
| White-breasted Nuthatch | Sitta carolinensis |
| White-breasted Waterhen | Amaurornis phoenicurus |
| White-breasted Wood Swallow | Artamus leucorhynchus |
| White-browed Coucal | Centropus superciliosus |
| White-capped Pionus | Pionus senilis |
| White-cheeked Pintail | Anas bahamensis |
| White-cheeked Touraco | Tauraco leucotis leucotis |
| White-chinned Petrel | Procellaria aequinoctialis |
| White-collared Kingfisher | Halcyon chloris |
| White-collared Seedeater | Sporophila torqueola |
| White-collared Swift | Streptoprocne zonaris |
| White-collared Yuhina | Yuhina diademata |
| White-crested Cockatoo | Cacatua alba alba |
| White-crested Guan | Penelope jacucaca pileata |
| White-Crested Hornbill | Berenicornis albocristatus |
| White-crested Laughing Thrush | Garrulax leucolophus |
| White-crested Touraco | Tauraco leucolophus |
| White-crowned Pigeon | Columba leucocephala |
| White-crowned Pionus | Pionus senilis |
| White-crowned Robin Chat | Cossypha albicapilla |
| White-crowned Sparrow | Zonotrichia leucophrys |
| White-eared Bulbul | Pycnonotus leucotis |
| White-eared Conure | Pyrrhura leucotis leucotis |
| White-eared Hummingbird | Hylocharis leucotis |
| White-eared Pheasant | Crossoptilon crossoptilon |
| White-eyed Conure | Aratinga leucophthalmus leucophthalmus |
| White-eyed Duck | Aythya australis |
| White-eyed Vireo | Vireo griseus |
| White-faced Ibis | Plegadis chihi |
| White-faced Owl | Sceloglaux albifacies |
| White-faced Piping Guan | Pipile pipile cumanensis |
| White-faced Scops Owl | Otus leucotis |
| White-faced Storm-Petrel | Pelagodroma marina |
| White-faced Tree Duck | Dendrocygna viduata |
| White-fronted Amazon | Amazona albifrons |
| White-fronted Bee-eater | Merops bullockoides |
| White-fronted Dove | Leptotila verreauxi verreauxi |
| White-headed Buffalo Weaver | Dinemellia dinemelli |
| White-headed Mousebird | Colius leucocephalus |
| White-headed Pionus | Pionus seniloides |
| White-headed Vulture | Aegypius occipitalis |
| White-headed Woodpecker | Picoides albolarvatus |
| White-naped Crane | Grus vipio |
| white-necked Crow | Corvus leucognaphalus |
| White-necked Raven | Corvus albicollis |
| White-rumped Sandpiper | Calidris fuscicollis |
| White-tailed Black Cockatoo | Calyptorhynchus baudinii baudinii |
| White-tailed Eagle | Haliaeetus albicilla |
| White-tailed Hawk | Buteo albicaudatus |
| White-tailed Hawk | Buteo albicaudatus |
| White-tailed Jay | Cyanocorax mystacalis |
| White-tailed Kite | Elanus leucurus |
| White-tailed Ptarmigan | Lagopus leucurus |
| White-tailed Sea Eagle | Haliaeetus albicilla |
| White-tailed Trogon | Trogon viridis |
| White-tailed Tropicbird | Phaethon lepturus |
| White-throated Bee-eater | Merops albicollis |
| White-throated Kingfisher | Halcyon smyrnensis |
| White-throated Needletail | Hirundapus caudacutus |
| White-throated Robin | Turdus assimilis |
| White-throated Sparrow | Zonotrichia albicollis |
| White-throated Swift | Aeronautes saxatalis |
| White-tipped Dove | Leptotila verreauxi |
| White-winged Crossbill | Loxia leucoptera |
| White-winged Dove | Zenaida asiatica |
| White-winged Dove | Zenaida asiatica |
| White-winged Parakeet | Brotogeris versicolorus |
| White-winged Parakeet | Brotogeris versicolurus |
| White-winged Scoter | Melanitta fusca |
| White-winged Tern | Chlidonias leucopterus |
| Whooper Swan | Cygnus cygnus |
| whooping Crane | Grus americana |
| Whooping Crane | Grus americana |
| Whooping Crane | Grus americana |
| Wild Turkey | Meleagris gallopavo |
| Wild Turkey | Meleagris gallopavo |
| Willet | Catoptrophorus semipalmatus |
| William’s Fig Parrot | Cyclopsitta gulielmitertii |
| Williamson’s Sapsucker | Sphyrapicus thyroideus |
| Willow Flycatcher | Empidonax traillii |
| Willow Ptarmigan | Lagopus lagopus |
| Wilson’s Phalarope | Phalaropus tricolor |
| Wilson’s Plover | Charadrius wilsonia |
| Wilson’s Storm-Petrel | Oceanites oceanicus |
| Wilson’s Warbler | Wilsonia pusilla |
| Winter Wren | Troglodytes troglodytes |
| Wompoo Fruit Dove | Ptilinopus magnificus |
| Wonga Pigeon | Leucosarcia melanoleuca |
| Wood Duck | Aix sponsa |
| Wood Duck | Aix sponsa |
| Wood Hoopoe | Phoeniculus purpureus |
| Wood Sandpiper | Tringa glareola |
| wood Stork | Mycteria americana |
| Wood Stork | Mycteria americana |
| Wood Stork | Mycteria americana |
| Wood Thrush | Hylochicla mustelina |
| Wood Thrush | Hylocichla mustelina |
| Wood Warbler | Phylloscopus sibilatrix |
| Woodford’s Owl | Strix woodfordii |
| Wood-Rail | Aramides |
| Woolly-necked Stork | Ciconia episcopus episcopus |
| Worm-eating Warbler | Helmitheros vermivorus |
| Worthen’s Sparrow | Spizella wortheni |
| Wreathed Hornbill | Aceros undulatus |
| Wrentit | Chamaea fasciata |
| Xantus’s Hummingbird | Hylocharis xantusii |
| Xantus’s Murrelet | Synthliboramphus hypoleucus |
| Yellow & Green Lorikeet | Trichoglossus flaviviridis |
| Yellow Bittern | Ixobrychus sinensis |
| Yellow Grosbeak | Pheucticus chrysopeplus |
| Yellow Rail | Coturnicops noveboracensis |
| Yellow Rosella | Platycercus flaveolus |
| Yellow Wagtail | Motacilla flava |
| Yellow Warbler | Dendroica petechia |
| Yellow-backed Chattering Lory | Lorius garrulus flavopalliatus |
| Yellow-backed Lory | Lorius garrulus flavopalliatus |
| Yellow-bellied Flycatcher | Empidonax flaviventris |
| Yellow-Bellied Fruit Pigeon | Treron waalia |
| Yellow-bellied Sapsucker | Sphyrapicus varius |
| Yellow-bellied Waxbill | Estrilda melanotis |
| Yellow-bibbed Lory | Lorius chlorocercus |
| Yellow-billed Amazon | Amazona leucocephala collaria |
| Yellow-billed Cardinal | Paroaria capitata |
| Yellow-billed Cuckoo | Coccyzus americanus |
| Yellow-billed Hornbill | Tockus flavirostris |
| Yellow-billed Loon | Gavia adamsii |
| Yellow-billed Magpie | Pica nuttalli |
| Yellow-billed Magpie | Pica nuttalli |
| Yellow-billed Spoonbill | Platalea flavipes |
| Yellow-billed Stork | Mycteria ibis |
| Yellow-breasted Bunting | Emberiza aureola |
| Yellow-breasted Chat | Icteria virens |
| Yellow-breasted Fruit Dove | Ptilinopus occipitalis |
| Yellow-breasted Toucan | Ramphastos ambiguus ambiguus |
| Yellow-cheeked Amazon | Amazona autumnalis autumnalis |
| Yellow-cheeked Conure | Aratinga pertinax |
| Yellow-collared Lory | Lorius chlorocercus |
| Yellow-collared Macaw | Ara auricollis |
| Yellow-crowned Amazon | Amazona ochrocephala ochrocephala |
| Yellow-crowned Night-Heron | Nyctanassa violacea |
| Yellow-eyed Junco | Junco phaeonotus |
| Yellow-faced Amazon | Amazona xanthops |
| Yellow-faced Grassquit | Tiaris olivacea |
| Yellow-faced Mynah | Mino dumontii |
| Yellow-footed Gull | Larus livens |
| Yellow-fronted Amazon | Amazona ochrocephala |
| Yellow-fronted Parakeet | Cyanoramphus auriceps |
| Yellow-fronted Woodpecker | Melanerpes flavifrons |
| Yellow-green Vireo | Vireo flavoviridis |
| Yellow-headed Amazon | Amazona oratrix oratrix |
| Yellow-headed Blackbird | Xanthocephalus xanthocephalus |
| Yellow-headed Vulture | Cathartes burrovianus |
| Yellowish-breasted Racquet-tail | Prioniturus flavicans |
| Yellow-legged Gull | Larus cachinnans |
| Yellow-lored Amazon | Amazona xantholora |
| Yellow-naped Amazon | Amazona auropalliata auropalliata |
| Yellow-naped Macaw | Ara auricollis |
| Yellow-nosed Albatross | Thalassarche chlororhynchos |
| Yellow-ridged Toucan | Ramphastos dicolorus culminatus |
| Yellow-rumped Cacique | Cacicus cela |
| Yellow-rumped Tinkerbird | Pogoniulus bilineatus |
| Yellow-rumped Warbler | Dendroica coronata |
| Yellow-shouldered Amazon | Amazona barbadensis barbadensis |
| yellow-shouldered Blackbird | Agelaius xanthomus |
| Yellow-sided Conure | Pyrrhura molinae hypoxantha |
| Yellow-streaked Lory | Chalcopsitta sintillata sintillata |
| Yellow-tailed Black Cockatoo | Calyptorhynchus funereus |
| Yellow-tailed Caique | Pionites leucogaster xanthurus |
| Yellow-thighed Caique | Pionites leucogaster xanthomeria |
| Yellow-throated Hanging Parrot | Loriculus pusillus pusillus |
| Yellow-throated Laughing Thrush | Garrulax galbanus |
| Yellow-throated Vireo | Vireo flavifrons |
| Yellow-throated Warbler | Dendroica dominica |
| Yellow-winged Amazon | Amazona aestiva xanthopteryx |
| Yucatan Vireo | Vireo magister |
| Yuma clapper Rail | Rallus longirostris yumanensis |
| Zebra Dove | Geopelia striata |
| Zebra Finch | Taeniopygia guttata |
| Zenaida Dove | Zenaida aurita |
| Zoe’s Imperial-Pigeon | Ducula zoeae |
| Zone-tailed Hawk | Buteo albonotatus |
