- Tachuri, Gray-backed / Polystictus superciliaris
- Tailorbird, Dark-necked / Orthotomus atrogularis
- Tailorbird, Rufous-tailed / Orthotomus sericeus
- Tanager, Azure-shouldered / Thraupis cyanoptera
- Tanager, Bay-headed / Tangara gyrola
- Tanager, Black-and-yellow Tanager / Chrysothlypis chrysomelas
- Tanager, Black-backed Bush / Urothraupis stolzmanni
- Tanager, Black-capped / Stilpnia heinei
- Tanager, Black-chested Mountain / Cnemathraupis eximia
- Tanager, Black-chinned Mountain-/ Anisognathus notabilis
- Tanager, Blue-and-yellow / Rauenia bonariensis
- Tanager, Blue-capped / Sporathraupis cyanocephala
- Tanager, Blue-gray / Thraupis episcopus
- Tanager, Blue-necked / Stilpnia cyanicollis
- Tanager, Blue-winged Mountain / Anisognathus somptuosus
- Tanager, Brassy-breasted / Tangara desmaresti
- Tanager, Brazilian / Ramphocelus bresilius
- Tanager, Buff-breasted Mountain / Dubusia taeniata
- Tanager, Burnished-buff / Stilpnia cayana
- Tanager, Chestnut-backed / Stilpnia preciosa
- Tanager, Crimson-backed / Ramphocelus dimidiatus
- Tanager, Crimson-collared / Ramphocelus sanguinolentus
- Tanager, Diademed / Stephanophorus diadematus
- Tanager, Dusky-faced / Mitrospingus cassinii
- Tanager, Emerald / Tangara florida
- Tanager, Fawn-breasted / Pipraeidea melanonota
- Tanager, Flame-colored / Piranga bidentata
- Tanager, Flame-crested / Loriotus cristatus
- Tanager, Flame-faced / Tangara parzudakii
- Tanager, Flame-rumped / Ramphocelus flammigerus
- Tanager, Gilt-edged / Tangara cyanoventris
- Tanager, Glistening-green / Chlorochrysa phoenicotis
- Tanager, Golden / Tangara arthus
- Tanager, Golden-chevroned / Thraupis ornata
- Tanager, Golden-collared / Iridosornis jelskii
- Tanager, Golden-crowned / Iridosornis rufivertex
- Tanager, Golden-eared / Tangara chrysotis
- Tanager, Golden-hooded / Stilpnia larvata
- Tanager, Golden-naped / Chalcothraupis ruficervix
- Tanager, Grass-green / Chlorornis riefferii
- Tanager, Gray-headed / Eucometis penicillata
- Tanager, Gray-hooded Bush / Cnemoscopus rubrirostris
- Tanager, Green-and-gold / Tangara schrankii
- Tanager, Green-headed / Tangara seledon
- Tanager, Hepatic / Piranga flava
- Tanager, Hooded Mountain / Buthraupis montana
- Tanager, Lacrimose Mountain / Anisognathus lacrymosus
- Tanager, Magpie / Cissopis leverianus
- Tanager, Masked Crimson / Ramphocelus nigrogularis
- Tanager, Moss-backed / Bangsia edwardsi
- Tanager, Olive-green / Orthogonys chloricterus
- Tanager, Opal-crowned / Tangara callophrys
- Tanager, Opal-rumped / Tangara velia
- Tanager, Orange-eared / Chlorochrysa calliparaea
- Tanager, Palm / Thraupis palmarum
- Tanager, Paradise / Tangara chilensis
- Tanager, Plain-colored / Tangara inornata
- Tanager, Red-crowned Ant- / Habia rubica
- Tanager, Red-necked / Tangara cyanocephala
- Tanager, Red-throated Ant- / Habia fuscicauda
- Tanager, Rose-throated / Piranga roseogularis
- Tanager, Ruby-crowned / Tachyphonus coronatus
- Tanager, Rufous-headed / Hemithraupis ruficapilla
- Tanager, Rust-and-yellow / Thlypopsis ruficeps
- Tanager, Saffron-crowned / Tangara xanthocephala
- Tanager, Sayaca / Thraupis sayaca
- Tanager, Scarlet / Piranga olivacea
- Tanager, Scarlet-bellied Mountain / Anisognathus igniventris
- Tanager, Scarlet-rumped / Ramphocelus passerinii
- Tanager, Silver-beaked / Ramphocelus carbo
- Tanager, Silver-throated / Tangara icterocephala
- Tanager, Slaty / Creurgops dentatus
- Tanager, Spangle-cheeked / Tangara dowii
- Tanager, Spotted / Ixothraupis punctata
- Tanager, Summer / Piranga rubra
- Tanager, Swallow / Tersina viridis
- Tanager, Turquoise / Tangara mexicana
- Tanager, Western / Piranga ludoviciana
- Tanager, White-lined / Tachyphonus rufus
- Tanager, Yellow-throated / Iridosornis analis
- Tanager, Yellow-winged / Thraupis abbas
- Tapaculo, Ocellated / Acropternis orthonyx
- Tattler, Gray-tailed / Tringa brevipes
- Tattler, Wandering / Tringa incana
- Tchagra, Black-crowned / Tchagra senegalus
- Tchagra, Three-streaked / Tchagra jamesi
- Teal, Andean / Anas andium
- Teal, Blue-billed / Spatula hottentota
- Teal, Blue-winged / Spatula discors
- Teal, Cape / Anas capensis
- Teal, Cinnamon / Spatula cyanoptera
- Teal, Gray / Anas gracilis
- Teal, Green-winged / Anas crecca
- Teal, Puna / Spatula puna
- Teal, Yellow-billed / Anas flavirostris
- Tern, Australian / Gelochelidon macrotarsa
- Tern, Black / Chlidonias niger
- Tern, Black-naped / Sterna sumatrana
- Tern, Bridled / Onychoprion anaethetus
- Tern, Caspian / Hydroprogne caspia
- Tern, Common / Sterna hirundo
- Tern, Elegant, / Thalasseus elegans
- Tern, Forster’s / Sterna forsteri
- Tern, Great Crested / Thalasseus bergii
- Tern, Gull-billed / Gelochelidon nilotica
- Tern, Inca / Larosterna inca
- Tern, Large-billed / Phaetusa simplex
- Tern, Least / Sternula antillarum
- Tern, Lesser Crested / Thalasseus bengalensis
- Tern, Little / Sternula albifrons
- Tern, Royal / Thalasseus maximus
- Tern, Sandwich / Thalasseus sandvicensis
- Tern, Sooty / Onychoprion fuscatus
- Tern, Whiskered / Chlidonias hybrida
- Tern, White / Gygis alba
- Tern, White-winged / Chlidonias leucopterus
- Thick-knee, Beach / Esacus magnirostris
- Thick-knee, Bush / Burhinus grallarius
- Thick-knee, Double-striped / Hesperoburhinus bistriatus
- Thick-knee, Peruvian / Hesperoburhinus superciliaris
- Thick-knee, Spotted / Burhinus capensis
- Thick-knee, Water / Burhinus vermiculatus
- Thistletail, White-chinned / Asthenes fuliginosa
- Thornbill, Brown / Acanthiza pusilla
- Thornbill, Chestnut-rumped / Acanthiza uropygialis
- Thornbill, Yellow / Acanthiza nana
- Thornbill, Yellow-rumped / Acanthiza chrysorrhoa
- Thornbird, Orange-breasted / Phacellodomus ferrugineigula
- Thornbird, Orange-eyed / Phacellodomus erythrophthalmus
- Thornbird, Rufous-fronted / Phacellodomus rufifrons
- Thornbird, Streak-fronted / Phacellodomus striaticeps
- Thrasher, Bendire's / Toxostoma bendirei
- Thrasher, Brown / Toxostoma rufum
- Thrasher, California / Toxostoma redivivum
- Thrasher, Crissal / Toxostoma crissale
- Thrasher, Curve-billed / Toxostoma curvirostre
- Thrasher, Long-billed / Toxostoma longirostre
- Thrasher, Sage / Oreoscoptes montanus
- Thrush, African / Turdus pelios
- Thrush, Andean Slaty / Turdus nigriceps
- Thrush, Black-billed / Turdus ignobilis
- Thrush, Black-breasted / Turdus dissimilis
- Thrush, Blue Rock- / Monticola solitarius
- Thrush, Blue Whistling- / Myophonus caeruleus
- Thrush, Bornean Whistling- / Myophonus borneensis
- Thrush, Chiguanco / Turdus chiguanco
- Thrush, Clay-colored / Turdus grayi
- Thrush, Cocoa / Turdus fumigatus
- Thrush, Creamy-bellied / Turdus amaurochalinus
- Thrush, Ecuadorian / Turdus maculirostris
- Thrush, Gray-cheeked / Catharus minimus
- Thrush, Great / Turdus fuscater
- Thrush, Hermit / Catharus guttatus
- Thrush, Lawrences / Turdus lawrencii
- Thrush, Little Rock- / Monticola rufocinereus
- Thrush, Mistle / Turdus viscivorus
- Thrush, Mountain / Turdus plebejus
- Thrush, Olive / Turdus olivaceus
- Thrush, Orange-headed / Geokichla citrina
- Thrush, Pale-breasted / Turdus leucomelas
- Thrush, Plumbeous-backed / Turdus reevei
- Thrush, Ruddy-capped Nightingale- / Catharus frantzii
- Thrush, Song / Turdus philomelos
- Thrush, Spectacled / Turdus nudigenis
- Thrush, Spotted Morning- / Cichladusa guttata
- Thrush, Swainson’s / Catharus ustulatus
- Thrush, Varied / Ixoreus naevius
- Thrush, White-necked / Turdus albicollis
- Thrush, Wood / Hylocichla mustelina
- Thrush, Yellow-legged / Turdus flavipes
- Tinamou, Great / Tinamus major
- Tinamou, Pale-browed / Crypturellus transfasciatus
- Tinkerbird, Red-fronted / Pogoniulus pusillus
- Tinkerbird, Yellow-fronted / Pogoniulus chrysoconus
- Tinkerbird, Yellow-rumped / Pogoniulus bilineatus
- Tit, Coal / Periparus ater
- Tit, Crested / Lophophanes cristatus
- Tit, Eurasian Blue / Cyanistes caeruleus
- Tit, Eurasian Penduline- / Remiz pendulinus
- Tit, Great / Parus major
- Tit, Japanese / Parus minor
- Tit, Long-tailed / Aegithalos caudatus
- Tit, Marsh / Poecile palustris
- Tit, Somali / Melaniparus thruppi
- Tit, Sombre / Poecile lugubris
- Tit, Sultan / Melanochlora sultanea
- Tit, White-bellied / Melaniparus albiventris
- Tit, Willow / Poecile montanus
- Titmouse, Black-crested / Baeolophus atricristatus
- Titmouse, Bridled / Baeolophus wollweberi
- Titmouse, Juniper / Baeolophus ridgwayi
- Titmouse, Oak / Baeolophus inornatus
- Titmouse, Tufted / Baeolophus bicolor
- Tityra, Black-crowned / Tityra inquisitor
- Tityra, Black-tailed / Tityra cayana
- Tityra, Masked / Tityra semifasciata
- Toucan, Channel-billed / Ramphastos vitellinus
- Toucan, Choco / Ramphastos brevis
- Toucan, Keel-billed / Ramphastos sulfuratus
- Toucan, Plate-billed Mountain- / Andigena laminirostris
- Toucan, Red-breasted / Ramphastos dicolorus
- Toucan, Toco / Ramphastos toco
- Toucan, White-throated / Ramphastos tucanus
- Toucan, Yellow-throated / Ramphastos ambiguus
- Toucanet, Blue-banded / Aulacorhynchus coeruleicinctis
- Toucanet, Crimson-rumped / Aulacorhynchus haematopygus
- Toucanet, Golden-collared / Selenidera reinwardtii
- Toucanet, Northern Emerald- / Aulacorhynchus prasinus
- Toucanet, Spot-billed / Selenidera maculirostris
- Towhee, Abert’s / Melozone aberti
- Towhee, California / Melozone crissalis
- Towhee, Canyon / Melozone fusca
- Towhee, Eastern / Pipilo erythrophthalmus
- Towhee, Green-tailed / Pipilo chlorurus
- Towhee, Spotted / Pipilo maculatus
- Treecreeper, Brown / Climacteris picumnus
- Treecreeper, Hume's / Certhia manipurensis
- Treecreeper, Red-browed / Climacteris erythrops
- Treecreeper, Short-toed / Certhia brachydactyla
- Treecreeper, White-throated / Cormobates leucophaea
- Treehunter, Pale-browed / Cichlocolaptes leucophrus
- Treehunter, Sharp-billed / Heliobletus contaminatus
- Treepie, Bornean / Dendrocitta cinerascens
- Treepie, Racket-tailed / Crypsirina temia
- Treerunner, Pearled / Margarornis squamiger
- Triller, Pied / Lalage nigra