- Taczanowski's Tinamou
- Taita White-eye
- Taiwan Barbet
- Taiwan Barwing
- Taiwan Bullfinch
- Taiwan Fulvetta
- Taiwan Green Pigeon
- Taiwan Partridge
- Taiwan Rosefinch
- Taiwan Scimitar Babbler
- Taiwan Thrush
- Taiwan Vivid Niltava
- Taiwan Whistling Thrush
- Taiwan Yuhina
- Tamaulipas Crow
- Tamaulipas Pygmy Owl
- Tanager Finch
- Tanzanian Red-billed Hornbill
- Tapajos Antpitta
- Tasmanian Nativehen
- Tataupa Tinamou
- Taveta Weaver
- Tawny-bellied Screech Owl
- Tawny-bellied Seedeater
- Tawny-breasted Wren-Babbler
- Tawny-browed Owl
- Tawny-rumped Tyrannulet
- Tawny-throated Leaftosser
- Tawny-tufted Toucanet
- Tawny Antpitta
- Tawny Eagle
- Tawny Fish Owl
- Temminck's Babbler
- Temminck's Seedeater
- Temminck's Sunbird
- Terrestrial Brownbul
- Thamnornis
- Thick-billed Ground Pigeon
- Thick-billed Miner
- Thick-billed Saltator
- Thick-billed Seedeater
- Thick-billed Weaver
- Thorn-tailed Rayadito
- Three-banded Warbler
- Three-streaked Tchagra
- Three-striped Hemispingus
- Three-striped Warbler
- Tibetan Sand Plover
- Ticking Doradito
- Tinkling Cisticola
- Tiny Hawk
- Tiny Sunbird
- Tiny Tyrant-Manakin
- Tit Hylia
- Titicaca Grebe
- Tocuyo Sparrow
- Tody Motmot
- Tolima Blossomcrown
- Tolima Dove
- Torotoroka Scops Owl
- Torrent Tyrannulet
- Torresian Crow
- Tourmaline Sunangel
- Tres Marias Hummingbird
- Tricolored Blackbird
- Trilling Cisticola
- Trinidad Euphonia
- Tristram's Bunting
- Tristram's Starling
- Tropical Boubou
- Tropical Parula
- Tropical Royal Flycatcher (mexicanus)
- Tropical Royal Flycatcher (occidentalis)
- Tropical Screech Owl
- Tufted Antshrike
- Tufted Jay
- Tufted Puffin
- Tufted Tit-Spinetail
- Tufted Tit-Tyrant
- Tumbes Hummingbird
- Tumbes Sparrow
- Tumbes Tyrant
- Turquoise-browed Motmot
- Turquoise Flycatcher
- Tyrannine Woodcreeper
- Tyrian Metaltail
- Tytler's Leaf Warbler