- Tacazze Sunbird
- Taiga Flycatcher
- Taita Fiscal
- Talamanca Hummingbird
- Tambourine Dove
- Tanzanian Red-billed Hornbill
- Taveta Weaver
- Tawny-flanked Prinia
- Tawny-winged Woodcreeper
- Tawny Antpitta
- Tawny Eagle
- Tawny Owl
- Tawny Pipit
- Temminck's Courser
- Temminck's Lark
- Temminck's Stint
- Tenerife Blue Chaffinch
- Tennessee Warbler
- Terek Sandpiper
- Thamnornis
- Thekla's Lark
- Thick-billed Euphonia
- Thick-billed Lark
- Thick-billed Murre
- Thick-billed Raven
- Three-banded Plover
- Three-striped Warbler
- Thrush Nightingale
- Tibetan Sand Plover
- Tickell's Blue Flycatcher
- Timberline Wren
- Torrent Tyrannulet
- Tourmaline Sunangel
- Tree Pipit
- Tree Swallow
- Tricolored Heron
- Tristram's Starling
- Tropical Boubou
- Tropical Gnatcatcher
- Tropical Kingbird
- Tropical Mockingbird
- Tropical Screech Owl
- Trumpeter Finch
- Tufted Duck
- Tundra Bean Goose
- Tundra Swan
- Turkestan Short-toed Lark
- Turkey Vulture
- Turquoise-browed Motmot
- Twite
- Tylas Vanga
- Tyrannine Woodcreeper