- Bahama Woodstar
- Baillon's Crake
- Bald Eagle
- Banded Broadbill
- Banded Lapwing
- Banded Quail
- Bar-bellied Pitta
- Bar-shouldered Dove
- Bar-tailed Godwit
- Bar-throated Minla
- Barbary Partridge
- Bare-eyed Rail
- Barking Owl
- Barn Swallow
- Barnacle Goose
- Barred Buttonquail
- Barred Cuckooshrike
- Barred Laughingthrush
- Barred Warbler
- Barrow's Goldeneye
- Baudin's Black Cockatoo
- Bearded Reedling
- Bearded Vulture
- Bearded Wood Partridge
- Beautiful Nuthatch
- Beautiful Sheartail
- Beijing Babbler
- Berylline Hummingbird
- Black-and-red Broadbill
- Black-and-yellow Broadbill
- Black-and-yellow Grosbeak
- Black-bellied Cuckooshrike
- Black-bellied Sandgrouse
- Black-bellied Storm Petrel
- Black-bellied Tern
- Black-bibbed Monarch
- Black-billed Mountain Toucan
- Black-breasted Buzzard
- Black-breasted Parrotbill
- Black-chinned Babbler
- Black-crested Coquette
- Black-crowned Night Heron
- Black-crowned White-eye
- Black-eared Catbird
- Black-eared Cuckoo
- Black-eared Fairy
- Black-eared Oriole
- Black-eared Shrike-babbler
- Black-faced Cuckooshrike
- Black-faced Laughingthrush
- Black-faced Woodswallow
- Black-fronted Dotterel
- Black-headed Bunting
- Black-headed Gull
- Black-headed Jay
- Black-headed Shrike-babbler
- Black-headed Trogon
- Black-hooded Sunbeam
- Black-legged Kittiwake
- Black-mantled Goshawk
- Black-naped Oriole
- Black-necked Aracari
- Black-necked Grebe
- Black-necked Stork
- Black-necklaced Scimitar Babbler
- Black-shouldered Kite
- Black-tailed Godwit
- Black-tailed Nativehen
- Black-thighed Falconet
- Black-throated Accentor
- Black-throated Bushtit
- Black-throated Laughingthrush
- Black-throated Loon
- Black-throated Parrotbill
- Black-throated Sunbird
- Black-throated Thrush
- Black-throated Toucanet
- Black-throated Whipbird
- Black-winged Kite
- Black-winged Pratincole
- Black-winged Snowfinch
- Black-winged Stilt
- Black Bittern
- Black Butcherbird
- Black Currawong
- Black Falcon
- Black Francolin
- Black Grouse
- Black Guillemot
- Black Kite (govinda)
- Black Lark
- Black Monarch
- Black Noddy
- Black Redstart
- Black Stilt
- Black Stork
- Black Swan
- Black Tern
- Black Wheatear
- Black Woodpecker
- Blood Pheasant
- Blue-banded Pitta
- Blue-banded Toucanet
- Blue-bearded Bee-eater
- Blue-billed Duck
- Blue-collared Parrot
- Blue-crowned Racket-tail
- Blue-eyed Cockatoo
- Blue-faced Honeyeater
- Blue-fronted Fig Parrot
- Blue-fronted Lancebill
- Blue-headed Pitta
- Blue-naped Pitta
- Blue-streaked Lory
- Blue-tailed Bee-eater
- Blue-throated Mountaingem
- Blue-throated Toucanet
- Blue-winged Minla
- Blue-winged Parakeet
- Blue-winged Parrot
- Blue-winged Pitta
- Blue Pitta
- Blue Rock Thrush
- Bluethroat
- Blyth's Hawk-Eagle
- Blyth's Tragopan
- Bohemian Waxwing
- Bonelli's Eagle
- Booted Eagle
- Boreal Owl
- Bourke's Parrot
- Brahminy Kite
- Brambling
- Brandt's Mountain Finch
- Brant Goose
- Brehm's Tiger Parrot
- Bridled Honeyeater
- Broad-billed Hummingbird
- Broad-billed Prion
- Broad-billed Sandpiper
- Brolga
- Bronze-tailed Plumeleteer
- Bronze Ground Dove
- Brown-backed Honeyeater
- Brown-capped Laughingthrush
- Brown-mandibled Aracari
- Brown Booby
- Brown Bullfinch
- Brown Cuckoo-Dove
- Brown Dipper
- Brown Falcon
- Brown Goshawk
- Brown Noddy
- Brown Parrotbill
- Brown Quail (australis)
- Brown Skua (lonnbergi)
- Brush Cuckoo
- Budgerigar
- Buff-breasted Paradise Kingfisher
- Buff-headed Coucal
- Buffy-crowned Wood Partridge
- Bulwer's Petrel
- Bulwer's Pheasant
- Bumblebee Hummingbird
- Buru Friarbird