ARKive's most wanted species listed alphabetically by scientific name
| Scientific name | Common name | Status |
|---|---|---|
| Tropodiaptomus simplex | VU | |
| Tropodiaptomus stuhlmanni | VU | |
| Truncatellina lussinensis | VU | |
| Trygonorrhina melaleuca | Magpie Fiddler Ray | EN |
| Tsaiorchis neottianthoides | VU | |
| Tsingymantis antitra | VU | |
| Tuberaria major | EN | |
| Tubuaia fosbergi | VU | |
| Tulipa cypria | EN | |
| Turbina inopinata | CR | |
| Turcorientalia hohenackeri | VU | |
| Turdus lherminieri | Forest Thrush | VU |
| Turdus ludoviciae | Somali Thrush | VU |
| Turdus xanthorhynchus | PrÃncipe Thrush | CR |
| Turgenitubulus aslini | VU | |
| Turgenitubulus depressus | VU | |
| Turgenitubulus foramenus | VU | |
| Turgenitubulus opiranus | VU | |
| Turgenitubulus pagodula | VU | |
| Turnagra capensis | South Island Piopio | EX |
| Turpinia stipulacea | VU | |
| Turraea adjanohounii | VU | |
| Turraea laciniata | Turraea | |
| Tylochromis microdon | EN | |
| Tylomelania kruimeli | CR | |
| Tylophora urceolata | VU | |
| Typhlatya monae | Mona Cave Shrimp | VU |
| Typhleotris madagascariensis | EN | |
| Typhleotris pauliani | EN | |
| Typhlobarbus nudiventris | VU | |
| Typhlogarra widdowsoni | VU | |
| Typhlops capitulatus | Haitian Pale-Lipped Blindsnake | EN |
| Typhlops cariei | EX | |
| Typhlops hectus | Tiburon Peninsula Blindsnake | EN |
| Typhlops manni | Mann's Worm Snake | VU |
| Typhlops monensis | Mona Blind Snake | EN |
| Typhlops schmutzi | Schmutz's Worm Snake | EN |
| Typhlops tasymicris | Grenada Bank Blindsnake | EN |
| Typhlopseudothelphusa mocinoi | EN | |
| Typhlosaurus lomiae | Lomi's Blind Legless Skink | VU |
| Tyrrhenaria ceratina | Corsican Snail | CR |
| Tyto aurantia | New Britain masked-owl | VU |
| Tyto manusi | Manus Masked-Owl | VU |
| Tyto nigrobrunnea | Taliabu Owl | EN |