- Blue-crowned Hanging Parrot
- Blue-crowned Laughingthrush
- Blue-crowned Lorikeet
- Blue-crowned Manakin
- Blue-crowned Motmot
- Blue-crowned Parakeet
- Blue-crowned Racket-tail
- Blue-crowned Racquet-tail
- Blue-crowned Trogon
- Blue-crowned Woodnymph
- Blue-diademed Motmot
- Blue-eared Barbet
- Blue-eared Kingfisher
- Blue-eared Lory
- Blue-eyed Cockatoo
- Blue-eyed Ground-Dove
- Blue-eyed Ground Dove
- Blue-faced Honeyeater
- Blue-faced Malkoha
- Blue-faced Parrot-Finch
- Blue-faced Parrotfinch
- Blue-faced Rail
- Blue-footed Booby
- Blue-fronted Blue-Flycatcher
- Blue-fronted Blue Flycatcher
- Blue-fronted Flycatcher
- Blue-fronted Lancebill
- Blue-fronted Lorikeet
- Blue-fronted Parrot
- Blue-fronted Parrotlet
- Blue-fronted Redstart
- Blue-fronted Robin
- Blue-fronted blue-flycatcher
- Blue-gray Cuckoo-shrike
- Blue-gray Cuckooshrike
- Blue-gray Gnatcatcher
- Blue-gray Noddy
- Blue-gray Robin
- Blue-gray Tanager
- Blue-green Emerald
- Blue-grey Cuckoo-shrike
- Blue-grey Cuckooshrike
- Blue-grey Gnatcatcher
- Blue-grey Noddy
- Blue-grey Robin
- Blue-grey Tanager
- Blue-headed Bee-eater
- Blue-headed Coucal
- Blue-headed Crested-Flycatcher
- Blue-headed Crested Flycatcher
- Blue-headed Fantail
- Blue-headed Hummingbird
- Blue-headed Kingfisher
- Blue-headed Macaw
- Blue-headed Paradise-flycatcher
- Blue-headed Parrot
- Blue-headed Pitta
- Blue-headed Quail-Dove
- Blue-headed Quail Dove
- Blue-headed Racket-tail
- Blue-headed Racquet-tail
- Blue-headed Rock Thrush
- Blue-headed Sapphire
- Blue-headed Sunbird
- Blue-headed Vireo
- Blue-headed Wagtail
- Blue-headed Wood-Dove
- Blue-headed Wood Dove
- Blue-knobbed Curassow
- Blue-lored Antbird
- Blue-mantled Crested-Flycatcher
- Blue-mantled Crested Flycatcher
- Blue-mantled Thornbill
- Blue-masked Leafbird
- Blue-moustached Barbet
- Blue-moustached Bee-eater
- Blue-naped Chlorophonia
- Blue-naped Mousebird
- Blue-naped Parrot
- Blue-naped Pitta
- Blue-naped Sunbird
- Blue-necked Jacamar
- Blue-necked Tanager
- Blue-rumped Manakin
- Blue-rumped Parrot
- Blue-rumped Pitta
- Blue-shouldered Robin-Chat
- Blue-shouldered Robin Chat
- Blue-spotted Wood-Dove
- Blue-spotted Wood Dove
- Blue-streaked Lory
- Blue-tailed Bee-Eater
- Blue-tailed Bee-eater
- Blue-tailed Emerald
- Blue-tailed Hummingbird
- Blue-tailed Imperial Pigeon
- Blue-tailed Paradise-Kingfisher
- Blue-tailed Paradise Kingfisher
- Blue-tailed Pitta
- Blue-tailed Trogon
- Blue-throated Barbet
- Blue-throated Bee-eater
- Blue-throated Blue-Flycatcher
- Blue-throated Blue Flycatcher
- Blue-throated Brown Sunbird
- Blue-throated Emerald Toucanet
- Blue-throated Flycatcher
- Blue-throated Goldentail
- Blue-throated Hillstar
- Blue-throated Hummingbird
- Blue-throated Macaw
- Blue-throated Motmot
- Blue-throated Mountain-gem
- Blue-throated Mountaingem
- Blue-throated Parakeet
- Blue-throated Piping-Guan
- Blue-throated Piping Guan
- Blue-throated Roller
- Blue-throated Sapphire
- Blue-throated Starfrontlet
- Blue-throated Toucanet
- Blue-throated blue-flycatcher
- Blue-tufted Starthroat
- Blue-vented Hummingbird
- Blue-wattled Bulbul
- Blue-wattled Crow
- Blue-whiskered Leafbird
- Blue-whiskered Tanager
- Blue-winged Goose
- Blue-winged Kookaburra
- Blue-winged Laughing-thrush
- Blue-winged Laughingthrush
- Blue-winged Leafbird
- Blue-winged Macaw
- Blue-winged Minla
- Blue-winged Mountain-Tanager
- Blue-winged Mountain Tanager
- Blue-winged Parakeet
- Blue-winged Parrot
- Blue-winged Parrotlet
- Blue-winged Pitta
- Blue-winged Racket-tail
- Blue-winged Racquet-tail
- Blue-winged Siva
- Blue-winged Teal
- Blue-winged Warbler
- Blue-winged parakeet
- Blue & White Swallow
- Blue Backed Conebill
- Blue Bird-of-Paradise
- Blue Bird-of-paradise
- Blue Bird of Paradise
- Blue Bonnet
- Blue Bunting
- Blue Bustard
- Blue Chaffinch
- Blue Cotinga
- Blue Coua
- Blue Crane
- Blue Crested-flycatcher
- Blue Crested Flycatcher
- Blue Cuckoo-shrike
- Blue Cuckooshrike
- Blue Dacnis
- Blue Duck
- Blue Eared-Pheasant
- Blue Eared Pheasant
- Blue Fairy-wren
- Blue Fairywren
- Blue Fantail
- Blue Finch
- Blue Flycatcher-robin
- Blue Grey Tanager
- Blue Grosbeak
- Blue Ground-Dove
- Blue Ground Dove
- Blue Grouse
- Blue Jay
- Blue Jewel-babbler
- Blue Jewel Babbler
- Blue Korhaan
- Blue Lorikeet
- Blue Lory
- Blue Madagascar Coucal
- Blue Magpie
- Blue Malkoha
- Blue Manakin
- Blue Mockingbird
- Blue Mountain Vireo
- Blue Noddy
- Blue Nuthatch
- Blue Paradise-Flycatcher
- Blue Paradise Flycatcher
- Blue Peafowl
- Blue Petrel
- Blue Pitta
- Blue Plantain-eater
- Blue Quail
- Blue Ridge Parkway
- Blue Rock-Thrush
- Blue Rock Thrush
- Blue Sawwing
- Blue Scrub-thrush
- Blue Seedeater
- Blue Swallow
- Blue Tit
- Blue Vanga
- Blue Waxbill
- Blue Whistling-Thrush
- Blue Whistling Thrush
- Blue Winged Mountain Tanager
- Blue Winged Teal
- Blue Wren-warbler
- Blue and Black Tanager
- Blue and Gold Tanager
- Blue and White Flycatcher
- Blue and White Kingfisher
- Blue and White Mockingbird
- Blue and White Swallow
- Blue and Yellow Macaw
- Blue and Yellow Tanager
- Bluebonnet
- Bluecap
- Bluethroat
- Bluish-fronted Jacamar
- Bluish-slate Antshrike
- Bluish Flowerpiercer
- Blunt-winged Reed-Warbler
- Blunt-winged Warbler
- Bluntschli's Vanga
- Blyth's Babbler
- Blyth's Crowned Warbler
- Blyth's Frogmouth
- Blyth's Hawk-Eagle
- Blyth's Hawk Eagle
- Blyth's Hornbill
- Blyth's Jungle-Babbler
- Blyth's Jungle Babbler
- Blyth's Kingfisher
- Blyth's Leaf-Warbler
- Blyth's Leaf Warbler
- Blyth's Long-tailed Tit
- Blyth's Myna
- Blyth's Nicobar Parakeet
- Blyth's Paradise-Flycatcher
- Blyth's Paradise Flycatcher
- Blyth's Parakeet
- Blyth's Parrotbill
- Blyth's Pipit
- Blyth's Reed-Warbler
- Blyth's Reed Warbler
- Blyth's Rosefinch
- Blyth's Shrike-Babbler
- Blyth's Shrike Babbler
- Blyth's Sibia
- Blyth's Starling
- Blyth's Swift
- Blyth's Tit
- Blyth's Tragopan
- Blyth's White-headed Starling
- Blyth's Wreathed Hornbill
- Blyth's hawk-eagle
- Blythe's Pipit
- Blythipicus
- Blythipicus pyrrhotis
- Blythipicus rubiginosus
- Blyth’s Cuckoo
- Blå Jungfrun National Park
- Boa Nova Tapaculo
- Boat-billed Flycatcher
- Boat-billed Heron
- Boat-billed Tody-Tyrant
- Boat-billed Tody Tyrant
- Boat-tailed Grackle
- Boatswain Bird
- Bob-tailed Weaver
- Bobiri
- Bobiri Butterfly Reserve
- Bobiri Butterfly Sanctuary
- Bobolink
- Bobwhite
- Bobwhites
- Bocage's Akalat
- Bocage's Bushshrike
- Bocage's Longbill
- Bocage's Robin
- Bocage's Sunbird
- Bocage's Weaver
- Bocagia
- Bocagia minuta
- Bocca di Sorba
- Bodega Bay
- Bodmin Moor
- Boehm's Bee-eater
- Boehm's Flycatcher
- Boehm's Spinetail
- Bogota Rail
- Bogota Sunangel
- Bohemia
- Bohemian Waxwing
- Bohol Sunbird
- Boissonneaua
- Boissonneaua flavescens
- Boissonneaua jardini
- Boissonneaua matthewsii
- Bokikokiko
- Bokmakierie
- Bokmakierie Bushshrike
- Bolbopsittacus
- Bolbopsittacus lunulatus
- Bolborhynchus
- Bolborhynchus aymara
- Bolborhynchus ferrugineifrons
- Bolborhynchus lineola
- Bolborhynchus orbygnesius
- Bold-striped Tit-Babbler
- Bold-striped Tit Babbler
- Bolemoreus
- Bolemoreus frenatus
- Bolemoreus hindwoodi
- Bolivar Flats Shorebird Sanctuary
- Bolivar Peninsula
- Bolivar Peninsula(SE Texas Coast)
- Bolivia
- Bolivian Blackbird
- Bolivian Brush-Finch
- Bolivian Brush Finch
- Bolivian Brushfinch
- Bolivian Cacique
- Bolivian Earthcreeper
- Bolivian Hemispingus
- Bolivian Recurvebill
- Bolivian Slaty-Antshrike
- Bolivian Slaty Antshrike
- Bolivian Spinetail
- Bolivian Tapaculo
- Bolivian Tyrannulet
- Bolivian Warbling-Finch
- Bolivian Warbling Finch
- Bolivian White-crowned Tapaculo
- Bolle's Pigeon
- Bolsa Chica
- Bolsa Chica Ecological Reserve
- Bolsa Chica Wetlands
- Bolsa Chica wetlands(Southern California - Orange County)


