- Baglafecht Weaver
- Baikal Bush Warbler
- Bananaquit
- Band-tailed Manakin
- Band-tailed Seedeater
- Banded Barbet
- Banded Broadbill
- Banded Kingfisher
- Banded Woodpecker
- Bank Cormorant
- Bar-backed Partridge
- Bar-tailed Godwit
- Bar-throated Minla
- Bare-cheeked Babbler
- Bare-eyed Thrush
- Bare-faced Go-away-bird
- Bare-faced Ibis
- Barn Swallow
- Barred Warbler
- Bat Falcon
- Bateleur
- Bay-headed Tanager
- Baya Weaver
- Bearded Barbet
- Bearded Mountaineer
- Bearded Vulture
- Bearded Woodpecker
- Beautiful Sunbird
- Belcher's Gull
- Bennett's Woodpecker
- Besra
- Bicolored Wren
- Black-and-red Broadbill
- Black-and-white-casqued Hornbill
- Black-and-white Mannikin
- Black-and-yellow Broadbill
- Black-backed Grosbeak
- Black-backed Puffback
- Black-bellied Bustard
- Black-bellied Sandgrouse
- Black-bellied Whistling Duck
- Black-billed Shrike-Tyrant
- Black-billed Wood Dove
- Black-breasted Thrush
- Black-browed Reed Warbler
- Black-capped Chickadee
- Black-capped Donacobius
- Black-capped Kingfisher
- Black-capped Social Weaver
- Black-cheeked Woodpecker
- Black-chested Buzzard-Eagle
- Black-chested Prinia
- Black-chested Snake Eagle
- Black-chinned Mountain Tanager
- Black-collared Barbet
- Black-collared Hawk
- Black-collared Starling
- Black-crested Antshrike
- Black-crested Bulbul
- Black-crowned Night Heron
- Black-crowned Tchagra
- Black-faced Sandgrouse
- Black-fronted Nunbird
- Black-headed Canary
- Black-headed Gull
- Black-headed Heron
- Black-headed Oriole
- Black-headed Weaver
- Black-headed Woodpecker
- Black-hooded Oriole
- Black-legged Kittiwake
- Black-lored Babbler
- Black-naped Monarch
- Black-naped Oriole
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Weaver
- Black-tailed Godwit
- Black-tailed Trogon
- Black-throated Accentor
- Black-throated Bushtit
- Black-throated Flowerpiercer
- Black-throated Laughingthrush
- Black-throated Sunbird
- Black-throated Wattle-eye
- Black-winged Kite
- Black-winged Lapwing
- Black-winged Lovebird
- Black-winged Pratincole
- Black-winged Red Bishop
- Black-winged Stilt
- Black Bishop
- Black Bulbul
- Black Coucal
- Black Crake
- Black Crowned Crane
- Black Drongo
- Black Harrier
- Black Heron
- Black Hornbill
- Black Kite
- Black Lark
- Black Phoebe
- Black Redstart
- Black Scimitarbill
- Black Skimmer
- Black Sparrowhawk
- Black Stork
- Black Tern
- Black Vulture
- Black Woodpecker
- Blackish Oystercatcher
- Blacksmith Lapwing
- Blanford's Lark (erlangeri)
- Blood-eared Parakeet
- Blue-and-white Flycatcher
- Blue-and-yellow Macaw
- Blue-and-yellow Tanager
- Blue-bearded Bee-eater
- Blue-billed Teal
- Blue-breasted Kingfisher
- Blue-capped Cordon-bleu
- Blue-cheeked Bee-eater
- Blue-eared Kingfisher
- Blue-footed Booby
- Blue-grey Tanager
- Blue-headed Parrot
- Blue-naped Mousebird
- Blue-necked Tanager
- Blue-spotted Wood Dove
- Blue-throated Barbet
- Blue-throated Bee-eater
- Blue-throated Piping Guan
- Blue-winged Goose
- Blue-winged Leafbird
- Blue-winged Mountain Tanager
- Blue-winged Teal
- Blue Crane
- Blue Pitta
- Blue Rock Thrush
- Blue Waxbill
- Blue Whistling Thrush
- Bluethroat
- Blyth's Reed Warbler
- Boat-billed Heron
- Böhm's Bee-eater
- Bokmakierie
- Booted Eagle
- Booted Warbler
- Bornean Spiderhunter
- Bradfield's Hornbill
- Brahminy Kite
- Brambling
- Brant Goose
- Brazilian Teal
- Brewer's Blackbird
- Brimstone Canary
- Bristle-crowned Starling
- Broad-billed Roller
- Bronze-winged Courser
- Bronze-winged Jacana
- Bronze Mannikin
- Bronzed Drongo
- Brown-backed Needletail
- Brown-breasted Barbet
- Brown-breasted Bulbul
- Brown-cheeked Fulvetta
- Brown-chested Martin
- Brown-crested Flycatcher
- Brown-crowned Tchagra
- Brown-headed Cowbird
- Brown-headed Gull
- Brown-headed Parrot
- Brown-hooded Kingfisher
- Brown-necked Parrot
- Brown-rumped Seedeater
- Brown-tailed Rock Chat
- Brown-throated Martin
- Brown-throated Parakeet
- Brown-throated Sunbird
- Brown-throated Wattle-eye
- Brown Accentor
- Brown Babbler
- Brown Barbet
- Brown Booby
- Brown Dipper
- Brown Firefinch
- Brown Fulvetta
- Brown Inca
- Brown Noddy
- Brown Pelican
- Brown Shrike
- Brown Snake Eagle
- Brown Violetear
- Brubru
- Bruce's Green Pigeon
- Budgerigar
- Buff-breasted Babbler
- Buff-crested Bustard
- Buff-necked Ibis
- Buff-rumped Woodpecker
- Buff-tailed Coronet
- Buff-throated Saltator
- Buff-winged Starfrontlet
- Buffy Fish Owl
- Buffy Pipit
- Burchell's Coucal
- Burchell's Sandgrouse
- Burchell's Starling
- Burrowing Owl
- Bushy-crested Hornbill