- Brush-Turkeys
- Brush Bronzewing
- Brush Cuckoo
- Brush Turkey
- Brush Turkeys
- Brush Wattlebird
- Brushland Tinamou
- Bryan's Shearwater
- Brünnich's Guillemot
- Buarremon
- Buarremon assimilis
- Buarremon atricapillus
- Buarremon basilicus
- Buarremon brunneinucha
- Buarremon costaricensis
- Buarremon perijanus
- Buarremon phaeopleurus
- Buarremon phygas
- Buarremon torquatus
- Buarremon virenticeps
- Bubalornis
- Bubalornis albirostris
- Bubalornis niger
- Bubbling Cisticola
- Bubo
- Bubo Africanus
- Bubo africanus
- Bubo africanus africanus
- Bubo ascalaphus
- Bubo ascalaphus ascalaphus
- Bubo bengalensis
- Bubo blakistoni
- Bubo bubo
- Bubo bubo hispanus
- Bubo bubo sibiricus
- Bubo capensis
- Bubo capensis mackinderi
- Bubo cinerascens
- Bubo coromandus
- Bubo flavipes
- Bubo ketupu
- Bubo lacteus
- Bubo leucostictus
- Bubo magellanicus
- Bubo nipalensis
- Bubo nipalensis nipalensis
- Bubo philippensis
- Bubo philippensis philippensis
- Bubo poensis
- Bubo scandiacus
- Bubo shelleyi
- Bubo sumatranus
- Bubo virginianus
- Bubo virginianus magellanicus
- Bubo virginianus nacurutu
- Bubo virginianus saturatus
- Bubo vosseleri
- Bubo zeylonensis
- Bubulcus Ibis
- Bubulcus coromandus
- Bubulcus ibis
- Bubulcus ibis coromandus
- Bubulcus ibis ibis
- Bucanetes
- Bucanetes githagineus
- Bucanetes githagineus amantum
- Bucanetes mongolicus
- Buccanodon
- Buccanodon duchaillui
- Bucco
- Bucco capensis
- Bucco macrodactylus
- Bucco noanamae
- Bucco tamatia
- Bucconidae
- Bucephala
- Bucephala albeola
- Bucephala clangula
- Bucephala islandica
- Buceros
- Buceros bicornis
- Buceros hydrocorax
- Buceros rhinoceros
- Buceros rhinoceros borneoensis
- Buceros vigil
- Bucerotidae
- Bucerotiformes
- Buckinghamshire
- Buckley's Forest-Falcon
- Buckley's Forest Falcon
- Buckley's forest-falcon
- Bucorvidae
- Bucorvus
- Bucorvus abyssinicus
- Bucorvus cafer
- Bucorvus leadbeateri
- Buda and Pilis Hills and Danube Bend
- Buda and Pilis Hills and Danube Bend Hungary
- Budderoo National Park
- Budgerigar
- Bue and Gold Tanager
- Buettikoferella
- Buettikoferella bivittata
- Buff-banded Bushbird
- Buff-banded Grassbird
- Buff-banded Rail
- Buff-banded Thicketbird
- Buff-banded Tyrannulet
- Buff-barred Warbler
- Buff-bellied Hermit
- Buff-bellied Hummingbird
- Buff-bellied Mannikin
- Buff-bellied Monarch
- Buff-bellied Penduline Tit
- Buff-bellied Pipit
- Buff-bellied Puffbird
- Buff-bellied Shrike-thrush
- Buff-bellied Shrike Thrush
- Buff-bellied Tanager
- Buff-bellied Warbler
- Buff-bellied or American Pipit
- Buff-belllied Flowerpecker
- Buff-breasted Babbler
- Buff-breasted Bowerbird
- Buff-breasted Buttonquail
- Buff-breasted Earthcreeper
- Buff-breasted Flycatcher
- Buff-breasted Jungle-Babbler
- Buff-breasted Jungle Babbler
- Buff-breasted Mannikin
- Buff-breasted Mountain-Tanager
- Buff-breasted Mountain Tanager
- Buff-breasted Paradise-Kingfisher
- Buff-breasted Paradise Kingfisher
- Buff-breasted Parrotbill
- Buff-breasted Pitta
- Buff-breasted Sabrewing
- Buff-breasted Sandpiper
- Buff-breasted Tody-Tyrant
- Buff-breasted Tody Tyrant
- Buff-breasted Whistler
- Buff-breasted Wren
- Buff-bridled Inca-Finch
- Buff-bridled Inca Finch
- Buff-browed Chachalaca
- Buff-browed Foliage-gleaner
- Buff-browed Warbler
- Buff-capped Babbler
- Buff-cheeked Greenlet
- Buff-cheeked Tody-Flycatcher
- Buff-chested Babbler
- Buff-chested Greenlet
- Buff-collared Nightjar
- Buff-crested Bustard
- Buff-faced Pygmy-Parrot
- Buff-faced Pygmy Parrot
- Buff-faced Scrubwren
- Buff-fronted Foliage-gleaner
- Buff-fronted Foliage Gleaner
- Buff-fronted Owl
- Buff-fronted Quail-Dove
- Buff-fronted Quail Dove
- Buff-headed Coucal
- Buff-necked Ibis
- Buff-necked Woodpecker
- Buff-rumped Thornbill
- Buff-rumped Warbler
- Buff-rumped Wheatear
- Buff-rumped Woodpecker
- Buff-shouldered Widowbird
- Buff-sided Robin
- Buff-spotted Flameback
- Buff-spotted Flufftail
- Buff-spotted Woodpecker
- Buff-streaked Bushchat
- Buff-streaked Chat
- Buff-streaked Wheatear
- Buff-tailed Coronet
- Buff-tailed Sicklebill
- Buff-thighed Puffleg
- Buff-throated Apalis
- Buff-throated Foliage-gleaner
- Buff-throated Partridge
- Buff-throated Purpletuft
- Buff-throated Saltator
- Buff-throated Sunbird
- Buff-throated Thickhead
- Buff-throated Tody-Tyrant
- Buff-throated Tody Tyrant
- Buff-throated Treehunter
- Buff-throated Warbler
- Buff-throated Warbling-Finch
- Buff-throated Warbling Finch
- Buff-throated Whistler
- Buff-throated Woodcreeper
- Buff-vented Bulbul
- Buff-winged Cinclodes
- Buff-winged Starfrontlet
- Buff Fronted Foilage Gleaner
- Buff Tailed Coronet
- Buffalo Myna
- Buffalo Mynah
- Bufflehead
- Buffon's Macaw
- Buffy-crested Hornbill
- Buffy-crowned Wood-Partridge
- Buffy-crowned Wood Partridge
- Buffy-flanked Brush-Finch
- Buffy-flanked Brush Finch
- Buffy-fronted Seedeater
- Buffy Fish-Owl
- Buffy Fish Owl
- Buffy Helmetcrest
- Buffy Hummingbird
- Buffy Laughingthrush
- Buffy Pipit
- Buffy Rock-jumper
- Buffy Rockjumper
- Buffy Tuftedcheek
- Bugeranus carunculata
- Bugeranus carunculatus
- Bugun Liocichla
- Bukida White-eye
- Bukidnon Woodcock
- Bulanik
- Bulanik Turkey
- Bulestes argenteus
- Bulestes mentalis
- Bulestes torquatus
- Bulgaria
- Bull-headed Shrike
- Buller's Albatross
- Buller's Mollymawk
- Buller's Shearwater
- Bullock's Oriole
- Bulo Burti Boubou
- Bulo Burti Bush-Shrike
- Bulo Burti Bushshrike
- Bulwer's Petrel
- Bulwer's Pheasant
- Bulweria
- Bulweria bulwerii
- Bulweria fallax
- Bumblebee Hummingbird
- Bundok Flycatcher
- Buphagidae
- Buphagus
- Buphagus africanus
- Buphagus erythrorhynchus
- Buphagus erythrorynchus
- Burchell's Coucal
- Burchell's Courser
- Burchell's Glossy-Starling
- Burchell's Glossy Starling
- Burchell's Sandgrouse
- Burchell's Starling
- Burdekin Duck
- Burgas Area Bulgaria
- Burgas area
- Burhinidae
- Burhinus
- Burhinus bistriatus
- Burhinus bistriatus vocifer
- Burhinus capensis
- Burhinus giganteus
- Burhinus grallarius
- Burhinus indicus
- Burhinus magnirostris
- Burhinus oedicnemus
- Burhinus oedicnemus saharae
- Burhinus recurvirostris
- Burhinus senegalensis
- Burhinus senegalensis inornatus
- Burhinus superciliaris
- Burhinus vermiculatus
- Burhinus vermiculatus vermiculatus
- Burkina Faso
- Burma
- Burmese Babbler
- Burmese Bush Lark
- Burmese Bushlark
- Burmese Grey Drongo
- Burmese Lark
- Burmese Nuthatch
- Burmese Rufous Piculet
- Burmese Shrike
- Burmese Tit
- Burmese Yuhina
- Burnished-buff Tanager
- Burnt-neck Eremomela
- Burnt-necked Eremomela
- Burro Creek
- Burro creek
- Burrowing Owl
- Burrowing Parakeet
- Burrowing Parrot
- Burton Marsh
- Burton Mere Wetlands
- Buru
- Buru Boobook
- Buru Cuckoo-shrike
- Buru Cuckooshrike
- Buru Dwarf-Kingfisher
- Buru Dwarf Kingfisher
- Buru Flowerpecker
- Buru Friarbird
- Buru Golden-Bulbul
- Buru Golden Bulbul
- Buru Green-Pigeon
- Buru Green Parrot
- Buru Green Pigeon
- Buru Honeyeater
- Buru Island
- Buru Jungle-Flycatcher
- Buru Jungle Flycatcher
- Buru Mountain-Pigeon
- Buru Mountain Pigeon
- Buru Mountain White-eye
- Buru Oriole
- Buru Pitta
- Buru Racket-tail
- Buru Racquet-tail
- Buru Thrush
- Buru White-eye
- Buru Yellow White-eye
- Buru or Streaky-breasted Jungle Flycatcher
- Burundi
- Busarellus nigricollis
- Bush-Crow
- Bush-Quail
- Bush-Quails
- Bush-Tit
- Bush-hen
- Bush-hens
- Bush Blackcap
- Bush Canary
- Bush Crow
- Bush Hen
- Bush Hens
- Bush Petronia
- Bush Pipit
- Bush Quail
- Bush Quails
- Bush Sparrow
- Bush Stone-curlew


