- Baird's Sandpiper
- Balearic Shearwater
- Bar-tailed Godwit
- Barn Swallow
- Barnacle Goose
- Black-crowned Night Heron
- Black-eared Wheatear
- Black-headed Gull
- Black-necked Grebe
- Black-throated Loon
- Black-winged Kite
- Black-winged Stilt
- Black Grouse
- Black Kite
- Black Redstart
- Black Stork
- Black Tern
- Bluethroat
- Bonelli's Eagle
- Booted Eagle
- Boreal Owl
- Brambling
- Brant Goose
- Brant Goose (nigricans)
- Buff-breasted Sandpiper