- Baer's Pochard
- Baglafecht Weaver
- Baikal Teal
- Bald Eagle
- Bali Myna
- Baltimore Oriole
- Bananaquit
- Banded Barbet
- Bank Myna
- Bar-headed Goose
- Bar-shouldered Dove
- Bar-tailed Godwit
- Bare-eyed Pigeon
- Bare-faced Go-away-bird
- Bare-faced Ground Dove
- Bare-faced Ibis
- Bare-legged Owl
- Bare-necked Fruitcrow
- Bare-throated Tiger Heron
- Barking Owl
- Barn Swallow
- Barnacle Goose
- Barred Honeyeater
- Barrow's Goldeneye
- Bat Falcon
- Bateleur
- Baya Weaver
- Beach Stone-curlew
- Bearded Barbet
- Bearded Reedling
- Bearded Vulture
- Bearded Woodpecker
- Beautiful Fruit Dove
- Beautiful Sunbird
- Belcher's Gull
- Bernier's Teal
- Berthelot's Pipit
- Black-backed Puffback
- Black-bellied Whistling Duck
- Black-billed Wood Dove
- Black-capped Donacobius
- Black-capped Flycatcher
- Black-capped Lory
- Black-capped Social Weaver
- Black-cheeked Lovebird
- Black-cheeked Waxbill
- Black-chested Buzzard-Eagle
- Black-chested Prinia
- Black-collared Barbet
- Black-collared Starling
- Black-crested Bulbul
- Black-crowned Night Heron
- Black-crowned Sparrow-Lark
- Black-faced Cuckooshrike
- Black-faced Grassquit
- Black-faced Sandgrouse
- Black-faced Woodswallow
- Black-fronted Dotterel
- Black-fronted Nunbird
- Black-headed Bulbul
- Black-headed Gull
- Black-headed Ibis
- Black-headed Nightingale-Thrush
- Black-headed Sibia
- Black-hooded Antshrike
- Black-hooded Oriole
- Black-legged Kittiwake
- Black-lored Babbler
- Black-naped Fruit Dove
- Black-naped Oriole
- Black-necked Crane
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Stork
- Black-necked Swan
- Black-necked Weaver
- Black-rumped Flameback
- Black-rumped Waxbill
- Black-tailed Godwit
- Black-tailed Gull
- Black-tailed Trogon
- Black-throated Canary
- Black-throated Finch
- Black-throated Flowerpiercer
- Black-vented Oriole
- Black-winged Kite
- Black-winged Lovebird
- Black-winged Myna
- Black-winged Red Bishop
- Black-winged Stilt
- Black Bulbul
- Black Butcherbird
- Black Caracara
- Black Crake
- Black Crowned Crane
- Black Drongo
- Black Eagle
- Black Guan
- Black Guillemot
- Black Kite
- Black Phoebe
- Black Redstart
- Black Siskin
- Black Stork
- Black Swan
- Black Thrush
- Black Vulture
- Black Woodpecker
- Blacksmith Lapwing
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-and-yellow Tanager
- Blue-bellied Parrot
- Blue-bellied Roller
- Blue-billed Duck
- Blue-billed Teal
- Blue-black Grassquit
- Blue-breasted Bee-eater
- Blue-breasted Kingfisher
- Blue-cheeked Amazon
- Blue-cheeked Bee-eater
- Blue-crowned Hanging Parrot
- Blue-crowned Laughingthrush
- Blue-crowned Lorikeet
- Blue-crowned Trogon
- Blue-eared Lory
- Blue-eyed Cockatoo
- Blue-faced Honeyeater
- Blue-faced Parrotfinch
- Blue-fronted Fig Parrot
- Blue-grey Tanager
- Blue-naped Mousebird
- Blue-streaked Lory
- Blue-tailed Bee-eater
- Blue-throated Piping Guan
- Blue-winged Kookaburra
- Blue Coua
- Blue Crane
- Blue Dacnis
- Blue Eared Pheasant
- Blue Grosbeak
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Bluish-fronted Jacamar
- Bluish-grey Saltator
- Blyth's Hornbill
- Blyth's Pipit
- Boat-billed Flycatcher
- Boat-billed Heron
- Bohemian Waxwing
- Bokmakierie
- Bornean Crested Fireback
- Brahminy Kite
- Brahminy Starling
- Brambling
- Brant Goose
- Brazilian Tanager
- Brazilian Teal
- Bright-rumped Yellow Finch
- Brimstone Canary
- Bristle-crowned Starling
- Broad-billed Flycatcher
- Broad-winged Hawk
- Brolga
- Bronze-winged Jacana
- Bronze Mannikin
- Bronzed Cowbird
- Bronzed Drongo
- Bronzy Sunbird
- Brown-crested Flycatcher
- Brown-headed Barbet
- Brown-hooded Kingfisher
- Brown-rumped Seedeater
- Brown Babbler
- Brown Cuckoo-Dove
- Brown Eared Pheasant
- Brown Falcon
- Brown Honeyeater
- Brown Jay
- Brown Lory
- Brown Pelican
- Brown Rock Chat
- Brown Wood Owl
- Bruce's Green Pigeon
- Brush Bronzewing
- Brush Cuckoo
- Budgerigar
- Buff-banded Rail
- Buff-crested Bustard
- Buff-necked Ibis
- Buff-rumped Warbler
- Buff-throated Saltator
- Bufflehead
- Buffy Fish Owl
- Burchell's Starling
- Burnished-buff Tanager
- Burrowing Owl
- Buru Racket-tail
- Bush Stone-curlew