The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 100 | next 100) (20 | 50 | 100 | 250 | 500)- Thapsinillas (0 members)
- Thaumasius (2 members)
- Thaumastura (1 member)
- Thectocercus (1 member)
- Theristicus (4 members)
- Thescelocichla (1 member)
- Thinocoridae (2 members)
- Thinocorus (2 members)
- Thinornis (0 members)
- Thlypopsis (8 members)
- Thomomys (1 member)
- Thraupidae (116 members)
- Thraupis (7 members)
- Threnetes (3 members)
- Threskiornis (6 members)
- Threskiornithidae (14 members)
- Thripadectes (7 members)
- Thripophaga (5 members)
- Thryomanes (1 member)
- Thryophilus (5 members)
- Thryorchilus (1 member)
- Thryothorus (1 member)
- Tiaris (1 member)
- Tichodroma (1 member)
- Tichodromidae (1 member)
- Tickellia (1 member)
- Tigriornis (1 member)
- Tigrisoma (3 members)
- Tijuca (0 members)
- Tilmatura (1 member)
- Timalia (1 member)
- Timaliidae (13 members)
- Timeliopsis (2 members)
- Timixos (3 members)
- Timor-Leste (1 member)
- Tinamidae (9 members)
- Tinamiformes (1 member)
- Tinamotis (2 members)
- Tinamus (5 members)
- Tityra (3 members)
- Tityridae (7 members)
- Tmetothylacus (1 member)
- Tockus (10 members)
- Todidae (1 member)
- Todiramphus (29 members)
- Todirostrum (7 members)
- Todus (5 members)
- Togo (0 members)
- Tolmomyias (7 members)
- Tonga (0 members)
- Topaza (2 members)
- Torgos (1 member)
- Torreornis (1 member)
- Touit (8 members)
- Toxorhamphus (2 members)
- Toxostoma (10 members)
- Trachyphonus (5 members)
- Tragopan (5 members)
- Traversia (1 member)
- Tregellasia (2 members)
- Treron (29 members)
- Tribonyx (2 members)
- Trichastoma (0 members)
- Trichixos (0 members)
- Trichocichla (0 members)
- Trichodere (1 member)
- Trichoglossus (9 members)
- Tricholaema (6 members)
- Tricholestes (1 member)
- Trichothraupis (1 member)
- Triclaria (1 member)
- Trigonoceps (1 member)
- Tringa (13 members)
- Trinidad and Tobago (2 members)
- Tripods & Heads (14 members)
- Trochalopteron (19 members)
- Trochilidae (118 members)
- Trochilus (2 members)
- Trochocercus (2 members)
- Troglodytes (12 members)
- Troglodytidae (20 members)
- Trogon (21 members)
- Trogonidae (6 members)
- Trogoniformes (1 member)
- Tropicoperdix (3 members)
- Tropicranus (0 members)
- Trugon (1 member)
- Tryngites (0 members)
- Tumbezia (1 member)
- Tunchiornis (1 member)
- Tunisia (4 members)
- Turacoena (3 members)
- Turdidae (22 members)
- Turdinus (3 members)
- Turdoides (25 members)
- Turdus (87 members)
- Turkey (11 members)
- Turkmenistan (0 members)
- Turnagra (2 members)
- Turnicidae (2 members)