- The Lodge
- The Lodge (Sandy Beds)
- The Lodge RSPB Reserve England
- The Loons
- The Loons Orkney Islands
- The Loons RSPB Reserve Orkney Islands, Scotland
- The Mens
- The Mens (Sussex)
- The Netherlands
- The Philippines
- The SASOL Larger Illustrated Guide to Birds of Southern Africa
- The Sibley Field Guide to Birds
- The Sibley Guide to Bird Life and Behavior
- The Sibley Guide to Birds
- The Strid Woods
- The Withens
- The Zijing Mountain (the Purple Mountain)(Nanjing)
- The virgin islands
- The withens(merseyside)
- Thectocercus
- Thectocercus acuticaudatus
- Thekla's Lark
- Thekla Lark
- Theresa's Ground-Sparrow
- Theresa's Ground-sparrow
- Theresa's Ground Sparrow
- Theresa's Snowfinch
- Theristicus
- Theristicus branickii
- Theristicus caerulescens
- Theristicus caudatus
- Theristicus melanopis
- Thescelocichla
- Thescelocichla leucopleura
- Thick-billed Berrypecker
- Thick-billed Canary
- Thick-billed Crow
- Thick-billed Cuckoo
- Thick-billed Euphonia
- Thick-billed Flowerpecker
- Thick-billed Fox-Sparrow
- Thick-billed Fox Sparrow
- Thick-billed Grasswren
- Thick-billed Green-Pigeon
- Thick-billed Green Pigeon
- Thick-billed Ground-Dove
- Thick-billed Ground-Pigeon
- Thick-billed Ground Dove
- Thick-billed Ground Pigeon
- Thick-billed Heleia
- Thick-billed Honeyguide
- Thick-billed Kingbird
- Thick-billed Lark
- Thick-billed Mannikin
- Thick-billed Miner
- Thick-billed Murre
- Thick-billed Nutcracker
- Thick-billed Parrot
- Thick-billed Pigeon
- Thick-billed Raven
- Thick-billed Reed-Warbler
- Thick-billed Saltator
- Thick-billed Seed-Finch
- Thick-billed Seed Finch
- Thick-billed Seedeater
- Thick-billed Siskin
- Thick-billed Spiderhunter
- Thick-billed Vireo
- Thick-billed Warbler
- Thick-billed Weaver
- Thick-billed White-eye
- Thicket Antpitta
- Thicket Tinamou
- Thicket or Fulvous-bellied Antpitta
- Thin-billed Flycatcher Warbler
- Thin-billed Prion
- Thingvellir National Park
- Thingvellir National Park Iceland
- Thinocoridae
- Thinocorus
- Thinocorus orbignyianus
- Thinocorus orbignyianus orbignyianus
- Thinocorus rumicivorus
- Thinornis
- Thinornis cucullatus
- Thinornis novaeseelandiae
- Thinornis rubricollis
- Thlypopsis
- Thlypopsis fulviceps
- Thlypopsis fulviceps fulviceps
- Thlypopsis inornata
- Thlypopsis ornata
- Thlypopsis pectoralis
- Thlypopsis pyrrhocoma
- Thlypopsis ruficeps
- Thlypopsis sordida
- Thlypopsis superciliaris
- Thol Bird Sanctuary
- Thorn-tailed Rayadito
- Thrasher
- Thrashers
- Thraupidae
- Thraupis
- Thraupis Episcopus
- Thraupis Ornata
- Thraupis abbas
- Thraupis bonariensis
- Thraupis bonariensis darwinii
- Thraupis cyanocephala
- Thraupis cyanocephala olivicyanea
- Thraupis cyanoptera
- Thraupis episcopus
- Thraupis episcopus caerulea
- Thraupis episcopus cana
- Thraupis episcopus quaesita
- Thraupis glaucocolpa
- Thraupis ornata
- Thraupis palmarum
- Thraupis palmarum violilavata
- Thraupis sayaca
- Three-banded Courser
- Three-banded Plover
- Three-banded Rosefinch
- Three-banded Warbler
- Three-streaked Tchagra
- Three-striped Flycatcher
- Three-striped Hemispingus
- Three-striped Tanager
- Three-striped Warbler
- Three-toed Crowtit
- Three-toed Jacamar
- Three-toed Parrotbill
- Three-toed Swiftlet
- Three-toed Woodpecker
- Three-wattled Bellbird
- Three Striped Warbler
- Threnetes
- Threnetes leucurus
- Threnetes niger
- Threnetes ruckeri
- Threnetes ruckeri ventosus
- Threskiornis
- Threskiornis aethiopica
- Threskiornis aethiopicus
- Threskiornis aethiopicus aethiopicus
- Threskiornis bernieri
- Threskiornis melanocephalus
- Threskiornis molucca
- Threskiornis molucca molucca
- Threskiornis moluccus
- Threskiornis solitarius
- Threskiornis spinicollis
- Threskiornithidae
- Thripadectes
- Thripadectes flammulatus
- Thripadectes holostictus
- Thripadectes ignobilis
- Thripadectes melanorhynchus
- Thripadectes rufobrunneus
- Thripadectes scrutator
- Thripadectes virgaticeps
- Thripias namaquus
- Thripophaga
- Thripophaga amacurensis
- Thripophaga berlepschi
- Thripophaga cherriei
- Thripophaga fusciceps
- Thripophaga macroura
- Thrush-Babbler
- Thrush-like Antpitta
- Thrush-like Manakin
- Thrush-like Mourner
- Thrush-like Schiffornis
- Thrush-like Woodcreeper
- Thrush-like Wren
- Thrush Babbler
- Thrush Nightingale
- Thryomanes
- Thryomanes bewickii
- Thryomanes sissonii
- Thryophilus
- Thryophilus nicefori
- Thryophilus pleurostictus
- Thryophilus rufalbus
- Thryophilus rufalbus castanonotus
- Thryophilus sernai
- Thryophilus sinaloa
- Thryorchilus
- Thryorchilus browni
- Thryothorus
- Thryothorus atrogularis
- Thryothorus coraya
- Thryothorus eisenmanni
- Thryothorus euophrys
- Thryothorus fasciatoventris
- Thryothorus felix
- Thryothorus genibarbis
- Thryothorus griseus
- Thryothorus guarayanus
- Thryothorus leucopogon
- Thryothorus leucotis
- Thryothorus longirostris
- Thryothorus ludovicianus
- Thryothorus ludovicianus ludovicianus
- Thryothorus maculipectus
- Thryothorus modestus
- Thryothorus mystacalis
- Thryothorus nicefori
- Thryothorus nigricapillus
- Thryothorus pleurostictus
- Thryothorus rufalbus
- Thryothorus rufalbus minlosi
- Thryothorus rutilus
- Thryothorus sclateri
- Thryothorus semibadius
- Thryothorus sinaloa
- Thryothorus spadix
- Thryothorus superciliaris
- Thryothorus thoracicus
- Thunberg's Swiftlet
- Thyolo Alethe
- Tiaris
- Tiaris bicolor
- Tiaris canora
- Tiaris canorus
- Tiaris fuliginosa
- Tiaris fuliginosus
- Tiaris obscura
- Tiaris obscurus
- Tiaris olivacea
- Tiaris olivacea pusilla
- Tiaris olivaceus
- Tibet
- Tibetan Babax
- Tibetan Blackbird
- Tibetan Bunting
- Tibetan Dove
- Tibetan Eared-Pheasant
- Tibetan Eared Pheasant
- Tibetan Ground-Jay
- Tibetan Ground Jay
- Tibetan Lark
- Tibetan Partridge
- Tibetan Rosefinch
- Tibetan Sandgrouse
- Tibetan Serin
- Tibetan Siskin
- Tibetan Snowcock
- Tibetan Snowfinch
- Tibetian Ground-Jay
- Tibetian Magpie
- Ticao Tarictic Hornbill
- Ticehurst's Leaf Warbler
- Tices Meadow
- Tichodroma
- Tichodroma muraria
- Tichodromidae
- Tick Bird
- Tickbird
- Tickell's Babbler
- Tickell's Blue-Flycatcher
- Tickell's Blue Flycatcher
- Tickell's Brown Hornbill
- Tickell's Flowerpecker
- Tickell's Laughingthrush
- Tickell's Leaf-Warbler
- Tickell's Leaf Warbler
- Tickell's Spotted Babbler
- Tickell's Thrush
- Tickell's Willow Warbler
- Tickellia
- Tickellia hodgsoni
- Ticking Doradito
- Tidore
- Tieke
- Tierra del Fuego
- Tiger-Heron
- Tiger-Herons
- Tiger Heron
- Tiger Herons
- Tiger Shrike
- Tigriornis
- Tigriornis leucolopha
- Tigriornis leucolophus
- Tigrisoma
- Tigrisoma fasciatum
- Tigrisoma lineatum
- Tigrisoma mexicanum
- Tihany
- Tihany Hungary
- Tijuca
- Tijuca atra
- Tijuca condita
- Tikal
- Tilden Park
- Tilden Regional Park
- Tilden Regional Park (California)
- Tiligul Liman
- Tiligul Liman Ukraine
- Tilmatura
- Tilmatura dupontii
- Tilos Island(Dodecanese Archipelago)
- Timalia
- Timalia pileata
- Timaliidae
- Timberline Sparrow
- Timberline Wren
- Timeliopsis
- Timeliopsis fallax
- Timeliopsis fulvigula
- Timeliopsis griseigula
- Timixos
- Timixos inornata
- Timixos olivacea
- Timixos rufogularis
- Timneh Parrot
- Timor
- Timor-Leste
- Timor Blue-Flycatcher
- Timor Blue Flycatcher
- Timor Bush-Warbler
- Timor Bush Warbler
- Timor Bushchat
- Timor Cuckoo-Dove
- Timor Cuckoo Dove
- Timor Figbird
- Timor Friarbird
- Timor Green-Pigeon
- Timor Green Pigeon
- Timor Honeyeater
- Timor Imperial-Pigeon
- Timor Imperial Pigeon
- Timor Leaf-Warbler
- Timor Leaf Warbler
- Timor Oriole
- Timor Red-winged Parrot
- Timor Sparrow
- Timor Stubtail
- Timor Whistler
- Timor White-eye
- Tinamidae
- Tinamiformes
- Tinamotis
- Tinamotis ingoufi
- Tinamotis pentlandii


