| Common Name | Scientific name |
|---|---|
| Tawny-shouldered Blackbird | Agelaius humeralis |
| Tawny-throated Leaftosser | Sclerurus mexicanus |
| Tawny-winged Woodcreeper | Dendrocincla anabatina |
| Temminck's Stint | Calidris temminckii |
| Temminck's Tragopan | Tragopan temminckii |
| Tennessee Warbler | Oreothlypis peregrina |
| Terek Sandpiper | Xenus cinereus |
| Thayer's Gull | Larus thayeri |
| Thick-billed Euphonia | Euphonia laniirostris |
| Thick-billed Kingbird | Tyrannus crassirostris |
| Thick-billed Parrot | Rhynchopsitta pachyrhyncha |
| Thick-billed Seed-Finch | Sporophila funerea |
| Thick-billed Vireo | Vireo crassirostris |
| Thicket Antpitta | Hylopezus dives |
| Thicket Tinamou | Crypturellus cinnamomeus |
| Three-wattled Bellbird | Procnias tricarunculatus |
| Thrush Nightingale | Luscinia luscinia |
| Timberline Wren | Thryorchilus browni |
| Tiny Hawk | Accipiter superciliosus |
| Tody Motmot | Hylomanes momotula |
| Tooth-billed Hummingbird | Androdon aequatorialis |
| Torrent Tyrannulet | Serpophaga cinerea |
| Townsend's Shearwater | Puffinus auricularis |
| Townsend's Solitaire | Myadestes townsendi |
| Townsend's Storm-Petrel | Oceanodroma socorroensis |
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