Tetr - Tric
- Tetracerus
- Tetracerus quadricornis
- Texas antelope squirrel
- Texas armadillo
- Texas pocket gopher
- Thallomys
- Thallomys paedulcus
- thamin
- thamin deer
- Thamnomys
- Thamnomys venustus
- Thecurus
- Thecurus pumilus
- Theropithecus
- Theropithecus gelada
- théropithèque gélada
- théropithèques
- thick-eared bat
- thick-spined rat
- thick-spined rats
- thick-tailed bushbabies
- thick-tailed bushbaby
- thick-tailed dromicia
- thick-tailed opossum
- thick-tailed opossums
- thick-tailed pygmy jerboa
- thick-tailed rat
- thick-tailed rats
- thick-tailed shrews
- thick-tailed three-toed jerboa
- thick-tailed three-toed jerboas
- thick-thumbed bat
- thick-thumbed pipistrelle
- thin-spined porcupine
- thin-spined porcupines
- thin-toed ground squirrels
- Thomasomys
- Thomasomys aureus
- Thomasomys monochromos
- Thomas’ dome-palated bat
