| Common Name | Scientific name |
|---|---|
| Swinhoe's Pheasant | Lophura swinhoii |
| Swinhoe's Storm Petrel | Oceanodroma monorhis |
| Sykes's Warbler | Iduna rama |
| Tabebuia rosea | Tabebuia rosea |
| Tacarcuna Chlorospingus | Chlorospingus tacarcunae |
| Tacarcuna Tapaculo | Scytalopus panamensis |
| Tacarcuna Warbler | Basileuterus tacarcunae |
| Tacarcuna Wood-Quail | Odontophorus dialeucos |
| Tahiti Petrel | Pterodroma rostrata |
| Taiga Bean Goose | Anser fabalis |
| Taiga Flycatcher | Ficedula albicilla |
| Talamanca Hummingbird | Eugenes spectabilis |
| Tamaulipas Crow | Corvus imparatus |
| Tamaulipas Pygmy-Owl | Glaucidium sanchezi |
| Tanimbar Cockatoo | Cacatua goffiniana |
| Tawny Owl | Strix aluco |
| Tawny Pipit | Anthus campestris |
| Tawny-breasted Flycatcher | Myiobius villosus |
| Tawny-capped Euphonia | Euphonia anneae |
| Tawny-chested Flycatcher | Aphanotriccus capitalis |
| Tawny-collared Nightjar | Antrostomus salvini |
| Tawny-crested Tanager | Tachyphonus delatrii |
| Tawny-crowned Greenlet | Tunchiornis ochraceiceps |
| Tawny-faced Gnatwren | Microbates cinereiventris |
| Tawny-faced Quail | Rhynchortyx cinctus |
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