ARKive's most wanted species listed alphabetically by scientific name
| Scientific name | Common name | Status |
|---|---|---|
| Tabebuia bibracteolata | VU | |
| Tabebuia dubia | VU | |
| Tabebuia elongata | EN | |
| Tabebuia furfuracea | VU | |
| Tabebuia hypoleuca | VU | |
| Tabebuia palustris | VU | |
| Tabernaemontana antheonycta | VU | |
| Tabernaemontana cordata | VU | |
| Tabernaemontana cumata | EN | |
| Tabernaemontana remota | VU | |
| Tacheocampylaea acropachia | EN | |
| Tacheocampylaea cyrniaca | EN | |
| Tacheocampylaea raspailii | VU | |
| Tacheocampylaea romagnolii | CR | |
| Tachycineta cyaneoviridis | Bahama swallow | EN |
| Tachygyia microlepis | Tonga Ground Skink | EX |
| Tacinga estevesii | VU | |
| Tadarida bregullae | Fijian Free-tailed Bat | EN |
| Tadarida johorensis | Northern Free-tailed Bat | VU |
| Tadarida tomensis | São Tomé Free-tailed Bat. | EN |
| Tadorna cristata | Crested shelduck | CR |
| Taipidon anceyana | EX | |
| Taipidon marquesana | EX | |
| Taipidon octolamellata | EX | |
| Takakia ceratophylla | VU | |
| Takydromus toyamai | Miyako Grass Lizard | EN |
| Talamancalia fosbergii | EN | |
| Talauma neilii | VU | |
| Talbotiella eketensis | EN | |
| Tamanka sarasinorum | Sarasin's Goby | VU |
| Tamias bulleri | Buller's Chipmunk | VU |
| Tamias palmeri | Palmer’s chipmunk | EN |
| Tamiasciurus mearnsi | Mearns’s squirrel | EN |
| Tampichthys dichromus | Bicolor Minnow | VU |
| Tampichthys mandibularis | Flatjaw Minnow | CR |
| Tanacetum oshanahanii | CR | |
| Tanacetum ptarmiciflorum | EN | |
| Tanakia tanago | Tokyo Bitterling | VU |
| Tanganyicia michelae | VU | |
| Tanousia zrmanjae | CR | |
| Tantalophis discolor | VU | |
| Tantilla boipiranga | VU | |
| Tantilla flavilineata | EN | |
| Tantilla shawi | EN | |
| Tanygnathus gramineus | Black-lored Parrot | VU |
| Taoniscus nanus | Dwarf Tinamou | VU |
| Tapeinosperma campanula | VU | |
| Tapinanthus preussii | VU | |
| Tapiphyllum schliebenii | EN | |
| Tapirira bethanniana | VU |