- Taiga Bean Goose
- Taiga Flycatcher
- Talamanca Hummingbird
- Tambourine Dove
- Tasman Sea Island Thrush
- Tasmanian Nativehen
- Tasmanian Scrubwren
- Tasmanian Thornbill
- Tawny-bellied Hermit
- Tawny-breasted Honeyeater
- Tawny-capped Euphonia
- Tawny-crested Tanager
- Tawny-crowned Honeyeater
- Tawny-faced Gnatwren
- Tawny-flanked Prinia
- Tawny-headed Swallow
- Tawny-throated Dotterel
- Tawny Antpitta
- Tawny Eagle
- Tawny Fish Owl
- Tawny Frogmouth
- Tawny Pipit
- Temminck's Stint
- Temminck's Tragopan
- Tennessee Warbler
- Terek Sandpiper
- Terrestrial Brownbul
- Tessmann's Flycatcher
- Thekla's Lark
- Thick-billed Cuckoo
- Thick-billed Euphonia
- Thick-billed Flowerpecker
- Thick-billed Grasswren
- Thick-billed Murre
- Thick-billed Warbler
- Thick-billed Weaver
- Thorn-tailed Rayadito
- Three-banded Plover
- Three-toed Parrotbill
- Three-wattled Bellbird
- Tibetan Lark
- Tibetan Sand Plover
- Tibetan Snowcock
- Tickell's Leaf Warbler
- Tickell's Thrush
- Tit Berrypecker
- Toco Toucan
- Tody Motmot
- Tomtit
- Torrent Duck
- Torrent Flyrobin
- Torresian Crow
- Torresian Imperial Pigeon
- Toucan Barbet
- Tourmaline Sunangel
- Tree Martin
- Tree Pipit
- Tricolored Heron
- Trilling Gnatwren
- Tristram's Starling
- Tropical Boubou
- Tropical Kingbird
- Tropical Mockingbird
- Tropical Parula
- Tropical Royal Flycatcher
- Tropical Screech Owl
- Trumpet Manucode
- Trumpeter Finch
- Trumpeter Hornbill
- Tufted Duck
- Tufted Tit-Tyrant
- Tui
- Turkestan Short-toed Lark
- Turkey Vulture
- Turquoise-fronted Amazon
- Turquoise Flycatcher
- Turquoise Jay
- Twelve-wired Bird-of-paradise
- Twite
- Two-banded Plover
- Tylas Vanga
- Tyrian Metaltail