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Bonaparte's Gull: Medium gull with black head and bill, gray back and wings, white underparts and tail. White outer primaries with black trailing edges are visible in flight. Legs are red-orange. Catches fish by wading and diving. Light and direct flight with rapid wing beat, ternlike.
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Brambling: Medium-sized finch with jet-black hood extending to upper back with orange shoulder patches, throat, and breast. Underparts are buff with black-spotted flanks. Wings are black with white and orange bars. Bounding flight, rapid wing beats alternating with wings at sides.
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Band-rumped Storm-Petrel: Black-brown storm-petrel with gray-brown wing bars and conspicuous white band across the rump and, large, slightly notched tail. Black bill, legs and feet. Bouyant, zigzag flight alternating several rapid wing beats with glide on horizontal or slightly downward-bowed wings.
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Bulwer's Petrel: Medium petrel, dark brown overall, pale diagonal bars across secondary coverts. Long tail is usually held in a point; wedge shape visible when fanned. Bill is black and hooked. Legs and feet are black. Feeds on squid, plankton and small fish. Picks food from surface while in flight.
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Brown Shrike: Small shrike, with warm brown upperparts and buff underparts. Face is white with black mask; throat is white. Bill is short, heavy, and hooked. Tail is long and round-tipped with faint bars. Eats small snakes, rodents, birds and insect. Low, swift flight on shallow, rapid wing beats.
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Brandt's Cormorant: Medium crestless cormorant with dull black body. Face, back have slender white plumes. Bright blue throat pouch bordered with yellow. Dives for fish, crabs and shrimp. Holds wings out to dry. Strong direct flight with rapid, powerful wing beats, flies in straight line formation.
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Brown Pelican: Large, unmistakable seabird, gray-brown body, dark brown, pale yellow head and neck, oversized bill. Black legs, webbed feet. Feeds on fish by plunge diving and scooping them up with pouch. Powerful flight alternates flaps with short glides. Flies close to the water in straight line.
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Black Scoter: Medium diving duck, entirely black except for yellow knob at base of black bill. Legs and feet are black. The male is the only all black duck in North America. Dives for food, primarily eats mollusks. Strong direct flight with rapid wing beats. Flies in straight line and V formation.
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Black-footed Albatross: Large seabird with long wings, gray-black body, and white ring around face at base of bill. Uppertail coverts are pale gray. Most have dark undertail coverts, some have white undertail and belly. The most frequently sighted albatross off the Pacific Coast of North America.
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Black-legged Kittiwake: Medium-sized white gull with pale gray back and upperwings and black wing tips. Bill is yellow, legs and feet are black. Swift graceful flight, alternates several rapid shallow wing beats with a glide. Often hovers over water before diving for prey at surface.
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Brant: Small goose, dark brown upperparts and brown-barred, pale gray underparts. Head is black; short black neck has partial white ring. Tail and vent are white. Western race, formerly known as the Black Brant, is darker. Heavy direct flight with strong wing beats. Flies in straight line formation.
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