Bachman's sparrow
Bachman's warbler
Baird's sandpiper
Baird's sparrow
Bald eagle
Baltimore oriole
Band-rumped storm petrel
Bank swallow
Bar tailed godwit
Barn owl
Barn Swallow
Barred owl
Barrow's goldeneye
Bay-breasted warbler
Bell's vireo
Belted kingfisher
Bendire's thrasher
Bewick's wren
Bicknell's thrush
Bishop's Oo
Black Francolin
Black Guillemont
Black Mamo
Black Noddy
Black Oystercatcher
Black Phoebe
Black Rail
Black Rosy-Finch
Black Scoter
Black Skimmer
Black Storm Petrel
Black Swift
Black Tern
Black Turnstone
Black Vulture
Black-and-White Warbler
Black Backed-wagtail
Black Backed-woodpecker
Black-Bellied plover
Black-Bellied Whistling Duck
Black-Billed Magpie
Black-Capped Chickadee
Black-Capped Vireo
Black-Chinned Humming Bird
Black-Chinned Sparrow
Black-Crested Titmouse
Black-Crowned Night Heron
Black-Footed Albatross
Black-Headed Grosbeak
Black-Legged Kittiwake
Black-Necked Stilt
Black-Tailed Gnatcher
Black-Throated Blue Warbler
Black-Throated Green Warbler
Black-Throated Sparrow
Black-Vented Shearwater
Black-Whiskered Vireo
Blackburnian Warbler
Blackpoll Warbler
Blue Grosbeak
Blue Grouse
Blue Jay
Blue-Gray Gnatcher
Blue-Headed Vireo
Blue-Throated Hummingbird
Blue-Winged Teal
Blue-Winged Warbler
Bluethroat
Boat-Tailed Grackle
Bobolink
Bohemian Waxwing
Bonaparte's Gull
Bonin Petrel
Boreal Chichadee
Boreal Owl
Botteri's Sparrow
Brandt's Cormorant
Brant
Brewer's Blackbird
Brewers Sparrow
Bridled Tern
Bridled Titmouse
Bristle-Thighed Curlew
Broad-Billed Hummingbird
Broad-tailed Hummingbird
Broad-Winged Hawk
Bronzed Cowbird
Brown Booby
Brown Creeper
Brown Noddy
Brown Pelican
Brown Thrasher
Brown-Capped Rosy Finch
Brown-Crested Flycatcher
Brown-Headed Cowbird
Brown-Headed Nuthatch
Buff-Bellied Hummingbird
Buff-Breasted Flycatcher
Buff-Breasted Sandpiper
Buff-Collared Nightjar
Bufflehead
Bullock's Oriole
Bulwer's Petrel
Burrowing Owl
Bush Tit