- Baglafecht Weaver
- Baird's Sandpiper
- Balearic Shearwater
- Baltimore Oriole
- Bananaquit
- Band-tailed Pigeon
- Band-tailed Seedeater
- Band-winged Nightjar
- Bar-headed Goose
- Bar-tailed Godwit
- Barbary Partridge
- Bare-faced Go-away-bird
- Bare-faced Ground Dove
- Bare-shanked Screech Owl
- Bare-throated Tiger Heron
- Barn Swallow
- Barnacle Goose
- Barred Antshrike
- Barrow's Goldeneye
- Bateleur
- Bay-headed Tanager
- Bay Wren
- Baya Weaver
- Bearded Mountaineer
- Bearded Reedling
- Bearded Vulture
- Bearded Woodpecker
- Beaudouin's Snake Eagle
- Beautiful Sunbird
- Belcher's Gull
- Belted Kingfisher
- Benguela Long-billed Lark
- Berthelot's Pipit
- Beryl-spangled Tanager
- Bicolored Antbird
- Black-and-chestnut Eagle
- Black-and-white-casqued Hornbill
- Black-and-white Owl
- Black-backed Grosbeak
- Black-bellied Bustard
- Black-bellied Hummingbird
- Black-bellied Sandgrouse
- Black-bellied Whistling Duck
- Black-billed Barbet
- Black-billed Magpie
- Black-billed Nightingale-Thrush
- Black-billed Peppershrike
- Black-billed Shrike-Tyrant
- Black-billed Thrush
- Black-billed Wood Dove
- Black-capped Bulbul
- Black-capped Donacobius
- Black-capped Social Weaver
- Black-capped Tanager
- Black-cheeked Woodpecker
- Black-chested Buzzard-Eagle
- Black-chested Prinia
- Black-chested Snake Eagle
- Black-collared Barbet
- Black-cowled Oriole
- Black-crowned Night Heron
- Black-crowned Tchagra
- Black-crowned Tityra
- Black-crowned Waxbill
- Black-faced Dacnis
- Black-faced Grassquit
- Black-faced Ibis
- Black-faced Sandgrouse
- Black-faced Solitaire
- Black-fronted Nunbird
- Black-headed Bunting
- Black-headed Gonolek
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Oriole
- Black-headed Parrot
- Black-headed Saltator
- Black-headed Trogon
- Black-headed Weaver
- Black-hooded Antshrike
- Black-hooded Oriole
- Black-hooded Sierra Finch
- Black-legged Kittiwake
- Black-lored Babbler
- Black-naped Monarch
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Weaver
- Black-striped Sparrow
- Black-tailed Godwit
- Black-tailed Tityra
- Black-tailed Trainbearer
- Black-thighed Grosbeak
- Black-throated Canary
- Black-throated Flowerpiercer
- Black-throated Loon
- Black-throated Mango
- Black-winged Ground Dove
- Black-winged Kite
- Black-winged Stilt
- Black Bishop
- Black Coucal
- Black Crake
- Black Eagle
- Black Flowerpiercer
- Black Guan
- Black Kite
- Black Metaltail
- Black Phoebe
- Black Redstart
- Black Siskin
- Black Stork
- Black Swan
- Black Tern
- Black Vulture
- Blackburnian Warbler
- Blackish Oystercatcher
- Blacksmith Lapwing
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-and-yellow Tanager
- Blue-billed Teal
- Blue-black Grassquit
- Blue-breasted Kingfisher
- Blue-capped Cordon-bleu
- Blue-capped Manakin
- Blue-capped Tanager
- Blue-cheeked Bee-eater
- Blue-chested Hummingbird
- Blue-faced Malkoha
- Blue-grey Tanager
- Blue-headed Coucal
- Blue-headed Parrot
- Blue-naped Chlorophonia
- Blue-naped Mousebird
- Blue-necked Tanager
- Blue-tailed Bee-eater
- Blue-tailed Emerald
- Blue-throated Piping Guan
- Blue-throated Toucanet
- Blue-winged Mountain Tanager
- Blue-winged Teal
- Blue Dacnis
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Blyth's Pipit
- Boat-billed Heron
- Bohemian Waxwing
- Bokmakierie
- Bolivian Tyrannulet
- Bonelli's Eagle
- Booted Eagle
- Boreal Owl
- Brahminy Kite
- Brambling
- Brant Goose
- Brewer's Blackbird
- Bridled Tern
- Bright-rumped Yellow Finch
- Brimstone Canary
- Broad-billed Motmot
- Broad-billed Roller
- Broad-tailed Hummingbird
- Broad-winged Hawk
- Bronze-tailed Plumeleteer
- Bronze-winged Parrot
- Bronze Mannikin
- Bronzy Sunbird
- Brown-backed Chat-Tyrant
- Brown-bellied Swallow
- Brown-breasted Flycatcher
- Brown-chested Lapwing
- Brown-crested Flycatcher
- Brown-crowned Tchagra
- Brown-headed Barbet
- Brown-headed Cowbird
- Brown-hooded Kingfisher
- Brown-hooded Parrot
- Brown-throated Wattle-eye
- Brown Booby
- Brown Jay
- Brown Noddy
- Brown Pelican
- Brown Shrike
- Brown Snake Eagle
- Brown Twinspot
- Brown Violetear
- Brubru
- Bruce's Green Pigeon
- Buff-bellied Warbler
- Buff-crested Bustard
- Buff-rumped Warbler
- Buff-tailed Coronet
- Buff-throated Saltator
- Buff-winged Starfrontlet
- Bufflehead
- Burchell's Coucal
- Burchell's Sandgrouse
- Burchell's Starling
- Burrowing Owl