The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 250 | next 250) (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)
- Turnix (17 members)
- Turtur (5 members)
- Tylas (1 member)
- Tympanuchus (3 members)
- Tyranneutes (2 members)
- Tyranni Incertae Sedis (2 members)
- Tyrannidae (108 members)
- Tyrannopsis (1 member)
- Tyrannulus (1 member)
- Tyrannus (13 members)
- Tyto (16 members)
- Tytonidae (2 members)
- U.S. Virgin Islands (0 members)
- Uganda (2 members)
- Ukraine (2 members)
- United Arab Emirates (0 members)
- United Kingdom (7 members)
- United States (50 members)
- Upucerthia (6 members)
- Upupa (2 members)
- Upupidae (1 member)
- Uraeginthus (3 members)
- Uragus (0 members)
- Uranomitra (1 member)
- Uratelornis (1 member)
- Uria (2 members)
- Urile (4 members)
- Urochroa (2 members)
- Urocissa (5 members)
- Urocolius (2 members)
- Urocynchramidae (1 member)
- Urocynchramus (1 member)
- Urodynamis (1 member)
- Uroglaux (1 member)
- Urolais (1 member)
- Urolestes (0 members)
- Uromyias (2 members)
- Uropelia (1 member)
- Uropsalis (2 members)
- Uropsila (1 member)
- Urorhipis (0 members)
- Urosphena (5 members)
- Urosticte (2 members)
- Urothraupis (1 member)
- Urotriorchis (1 member)
- Uruguay (0 members)
- Utah (3 members)
- Uzbekistan (0 members)
- Vanellus (23 members)
- Vanga (1 member)
- Vangidae (21 members)
- Vanuatu (0 members)
- Vauriella (4 members)
- Veles (1 member)
- Venezuela (1 member)
- Veniliornis (12 members)
- Veracruz (1 member)
- Vermivora (9 members)
- Vermont (1 member)
- Verreauxia (1 member)
- Vestiaria (0 members)
- Victoria (1 member)
- Videos (548 members)
- Vidua (19 members)
- Viduidae (2 members)
- Vietnam (0 members)
- Vini (11 members)
- Vireo (33 members)
- Vireolanius (4 members)
- Vireonidae (8 members)
- Virginia (0 members)
- Viridonia (1 member)
- Volatinia (1 member)
- Vosea (0 members)
- Vultur (1 member)
- WWT (7 members)
- Wales (32 members)
- Wallis and Futuna (0 members)
- Warwickshire (5 members)
- Washington (3 members)
- West India (31 members)
- West Midlands (1 member)
- West Virginia (0 members)
- Western Australia (6 members)
- Western Sahara (0 members)
- Wetmorethraupis (1 member)
- Willisornis (2 members)
- Wilsonia (0 members)
- Wiltshire (3 members)
- Wisconsin (1 member)
- Woodfordia (0 members)
- Worcestershire (4 members)
- Wyoming (2 members)
- Xanthocephalus (1 member)
- Xanthomixis (4 members)
- Xanthomyza (0 members)
- Xanthopsar (1 member)
- Xanthotis (4 members)
- Xanthoura (0 members)
- Xema (1 member)
- Xenerpestes (3 members)
- Xenicus (2 members)
- Xenocopsychus (1 member)
- Xenodacnis (1 member)
- Xenoglaux (1 member)
- Xenoligea (1 member)
- Xenoperdix (1 member)
- Xenopipo (2 members)
- Xenopirostris (3 members)
- Xenops (3 members)
- Xenopsaris (1 member)
- Xenornis (1 member)
- Xenospingus (1 member)
- Xenospiza (1 member)
- Xenotriccus (2 members)
- Xenus (1 member)
- Xiphidiopicus (1 member)
- Xiphirhynchus (0 members)
- Xiphocolaptes (4 members)
- Xipholena (3 members)
- Xiphorhynchus (13 members)
- Xolmis (2 members)
- Yemen (1 member)
- Yorkshire (23 members)
- Yugoslavia (0 members)
- Yuhina (10 members)
- Yukon Territory (0 members)
- Yungipicus (7 members)
- Zambia (0 members)
- Zanclostomus (1 member)
- Zanda (3 members)
- Zapornia (13 members)
- Zaratornis (1 member)
- Zarhynchus (0 members)
- Zavattariornis (1 member)
- Zebrilus (1 member)
- Zeledonia (1 member)
- Zeledoniidae (1 member)
- Zenaida (7 members)
- Zentrygon (8 members)
- Zimbabwe (0 members)
- Zimmerius (13 members)
- Zonerodius (1 member)
- Zonibyx (1 member)
- Zonotrichia (5 members)
- Zoonavena (3 members)
- Zoothera (21 members)
- Zosteropidae (14 members)
- Zosterops (106 members)
- Zosterornis (5 members)