- Balearic Shearwater
- Bananaquit
- Bar-headed Goose
- Bar-tailed Godwit
- Barn Swallow
- Barnacle Goose
- Barred Warbler
- Bearded Reedling
- Berthelot's Pipit
- Black-crowned Night Heron
- Black-faced Grassquit
- Black-headed Gull
- Black-legged Kittiwake
- Black-necked Grebe
- Black-necked Stilt
- Black-tailed Godwit
- Black-winged Stilt
- Black Kite
- Black Redstart
- Black Stork
- Black Swan
- Black Tern
- Black Woodpecker
- Bluethroat
- Bohemian Waxwing
- Brambling
- Brant Goose
- Broad-winged Hawk
- Brown Booby
- Brown Noddy
- Brown Pelican
- Brown Trembler