- Bar-headed Goose
- Bar-tailed Godwit
- Bare-faced Curassow
- Bare-faced Ibis
- Barn Swallow
- Barnacle Goose
- Bateleur
- Bearded Reedling
- Black-backed Water Tyrant
- Black-bellied Bustard
- Black-bellied Whistling Duck
- Black-browed Albatross
- Black-collared Hawk
- Black-crowned Night Heron
- Black-fronted Nunbird
- Black-headed Gull
- Black-headed Heron
- Black-legged Kittiwake
- Black-necked Grebe
- Black-necked Stork
- Black-necked Weaver
- Black-rumped Flameback
- Black-tailed Godwit
- Black-winged Kite
- Black-winged Stilt
- Black Crake
- Black Drongo
- Black Eagle
- Black Guillemot
- Black Heron
- Black Kite
- Black Redstart
- Black Skimmer
- Black Stork
- Black Vulture
- Blackish Cinclodes
- Blue-and-yellow Macaw
- Bohemian Waxwing
- Brahminy Starling
- Brambling
- Brant Goose
- Brown-chested Martin
- Brown Fish Owl
- Brown Skua
- Buff-necked Ibis
- Burrowing Owl