- Baikal Teal
- Balearic Shearwater
- Banded Martin
- Banded Prinia
- Bar-breasted Firefinch
- Bar-headed Goose
- Bar-tailed Godwit
- Barn Swallow
- Barnacle Goose
- Bearded Reedling
- Beautiful Sunbird
- Bicolored Conebill
- Black-and-white Mannikin
- Black-and-white Shrike-flycatcher
- Black-bellied Seedcracker
- Black-bellied Whistling Duck
- Black-capped Donacobius
- Black-collared Hawk
- Black-crowned Night Heron
- Black-crowned Tchagra
- Black-crowned Tityra
- Black-headed Gull
- Black-headed Lapwing
- Black-headed Parrot
- Black-headed Waxbill
- Black-necked Aracari
- Black-necked Grebe
- Black-necked Weaver
- Black-tailed Godwit
- Black-tailed Tityra
- Black-winged Oriole
- Black-winged Pratincole
- Black-winged Stilt
- Black Bee-eater
- Black Coucal
- Black Crake
- Black Kite
- Black Redstart
- Black Skimmer
- Black Stork
- Black Swan
- Black Tern
- Black Vulture
- Black Woodpecker
- Blue-and-white Swallow
- Blue-black Grassquit
- Blue-breasted Bee-eater
- Blue-breasted Kingfisher
- Blue-grey Tanager
- Blue-headed Coucal
- Blue-spotted Wood Dove
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Brambling
- Brant Goose
- Bronze Mannikin
- Bruce's Green Pigeon
- Buff-breasted Sandpiper
- Burnished-buff Tanager