- Tacazze Sunbird
- Taczanowski's Ground Tyrant
- Tahiti Swallow
- Tambourine Dove
- Tawny-flanked Prinia
- Tawny-shouldered Blackbird
- Tawny Eagle
- Tawny Owl
- Tawny Pipit
- Temminck's Courser
- Temminck's Stint
- Terek Sandpiper
- Thekla's Lark
- Thick-billed Euphonia
- Thick-billed Murre
- Thick-billed Raven
- Thick-billed Weaver
- Three-banded Courser
- Three-banded Plover
- Three-wattled Bellbird
- Tomtit
- Tooth-billed Tanager
- Torrent Duck
- Torrent Tyrannulet
- Tree Pipit
- Tree Swallow
- Tricolored Heron
- Tricolored Munia
- Tropical Kingbird
- Tropical Mockingbird
- Tropical Royal Flycatcher (mexicanus)
- Tufted Duck
- Tufted Tit-Tyrant
- Tui
- Tundra Swan
- Turkey Vulture
- Turquoise-browed Motmot
- Twite
- Two-banded Plover