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Blue Bunting: Small, stocky bunting with stout, black bill. Male is deep blue overall with black face and upper breast. Forages on ground, in thickets and in brushy understory for seeds, insects and larvae. Short flight, alternates rapid wing beats with wings pulled briefly to sides.
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Brown-capped Rosy-Finch: Medium finch, pink-red overall with black forehead, brown head, breast, back. Black bill in summer, yellow with black tip in winter. Forages on ground, eats seeds, sometimes insects. Swift bouncy flight, alternates rapid wing beats with wings pulled to sides.
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Bronzed Cowbird: Small blackbird (aeneus), brown-black overall with blue sheen on wings and tail. Eyes are red and bill is dark and heavy. Feeds on insects, seeds and grains. Often follows cattle to eat insects that are kicked up. Swift direct and swooping flight with rapid wing beats.
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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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Bluethroat: Small thrush with brown upperparts, striking blue bib with rust-brown central spot, black and brown-orange bands across breast, thick white eyebrow, and white underparts. Tail is dark with rust-brown base. Rather swift, deliberate direct flight on rapidly beating wings.
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Bohemian Waxwing: Large waxwing with gray upperparts, pink-gray crest, black mask and chin, and gray underparts. The wings are black with a sharp yellow or white line and red spots on primaries (visible when folded). Tail is dark and yellow-tipped with cinnamon-brown undertail coverts.
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Black Storm-Petrel: Small seabird, brown-black overall with long, dark wings showing pale bar on upper side, and forked tail. The hooked bill is dark and has a tube on top. Legs and feet are black. Flight is mothlike with deep, steady wing beats. Comes closer to shore than most other storm-petrels.
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Black-capped Chickadee: Medium-sized, stocky chickadee with pale gray upperparts and breast and pale olive-brown underparts. The black cap and bib and white cheeks are conspicuous. Black bill is short and thin. Wings are dark with broad white edges on feathers. State bird of Maine and Massachusetts.
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Botteri's Sparrow: Medium-sized sparrow with brown-streaked, gray upperparts and pale gray underparts. Bill is gray. Wings are tinged rust-brown. Tail is gray-brown, long, and round-tipped. Short flights with rapidly beating wing strokes alternating with wings pulled briefly to sides.
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Bachman's Sparrow: Medium-sized sparrow with brown-streaked gray upperparts and buff underparts except for white belly. Face is gray with brown crown and a thin, dark line extending back from eye. The tail is long, dark, and round-tipped. Upper mandible is dark. Legs and feet are pink.
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Buff-breasted Flycatcher: Smallest Empidonax flycatcher; fresh adult has gray-brown upperparts and pale underparts washed with yellow and cinnamon. White eyering is distinct; two wingbars are white. Short bill with black upper mandible and yellow to pink lower mandible. Legs and feet are gray-black.
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Black-crested Titmouse: Large titmouse with gray upperparts, pale gray underparts, and rust-brown flanks. The head has black cap and crest, pale gray face, and pale eye-ring. Wings and tail are gray. Gray legs and feet. Was once considered a subspecies of the Tufted Titmouse. AKA Mexican Titmouse.
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Budgerigar: Small parakeet, mostly green in its wild form and may have varying amounts blue, white, or yellow in feral U.S. populations. Has a characteristic pug face, and most have finely barred upperparts. Feeds primarily on grass seeds. Birds in a flock fly in a charecteristic undulating manner.
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Broad-billed Sandpiper: Small sandpiper with a long bill that curves down at the tip. Pale-edged dark brown feathers on upperparts give a scaled appearance; back shows two pale streaks in flight; underparts are white with dark spots on breast and neck. Head has dark cap and forked white eyebrows.
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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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Bahama Swallow: Medium-sized swallow with dark blue-green upperparts and cap extending below eye, and steel-blue wings, white chin, throat and underparts, and deeply forked tail. The bill, legs and feet are black. Swift, graceful flight, alternating rapid wing beats with long glides.
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Boreal Chickadee: Large chickadee, brown upperparts, dark brown cap, small black bib, gray face and neck, white cheek, rufous sides, white underparts. Gray wings, tail. Short, weak flights on rapidly beating wings. Alternates several quick, shallow strokes with wings pulled to sides.
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Black-vented Oriole: Large oriole with black hood, upper back, wings, and tail, including vent. Underparts and lower back are bright yellow-orange. Black bill is long and slender. Legs and feet are gray. Forages in trees and bushes. Feeds on insects, berries and fruit. Strong, swift, direct flight.
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Black-whiskered Vireo: Large vireo with olive-green upperparts and olive-buff washed white underparts. The head has gray crown, dark whiskers (moustache stripe) along sides of throat, white eyebrow with black border, and red-brown eyes. The bill is black, straight, and slightly hooked.
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Bicknell's Thrush: Small thrush, olive-brown upperparts, buff breast with brown spots, white or buff belly. Eye has faint gray ring. Upper mandible black with pale base, lower mandible yellow with black tip. Tail, rump have rust-brown wash. Swift, direct flight with jerky wing strokes.
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Buff-collared Nightjar: Small nightjar, mottled gray-brown upperparts, buff collar that appears lighter on dark throat, pale gray-brown underparts with dark brown bars. Tail is gray-brown with white corners. Legs and feet are black. Flight is silent and bouyant on flicking wing beats.
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Blue-throated Hummingbird: Large hummingbird with bronze-green upperparts, bronze-brown rump, brilliant purple-blue throat, gray underparts. Tail is dark, occasionally washed with blue-black, and has white corners. Feeds on nectar and insects. Direct and hovering flight with very rapid wing beats.
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Baird's Sparrow: Small sparrow with pale-streaked, rich dark brown upperparts, white underparts, and dark streaks on upper breast and flanks. Orange-brown crown is marked with fine dark lines. Legs and feet are pink-brown. Short low flights, alternates rapid wing beats with wings pulled to sides.
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Black Swift: Large, bulky swift, black overall. Wrist (wing angle) is very close to body. Long, slightly forked tail, often fanned out. It is the largest North American swift. Spends most of its time thousands of feet in the air. It flies on stiff, shallow wingbeats. Soars on thermals and updrafts.
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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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Blue Grosbeak: Large finch, bright purple-blue body, black face, and two wide, brown wingbars. Dark wings, tail. Hops on ground to forage. Gleans from bushes, weeds and trees. Feeds on insects, snails, grains, seeds and fruits. Swift flight, alternates rapid wing beats with wings pulled to sides.
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Black Rosy-Finch: Medium finch with black-brown breast and back, and gray headband. Belly, rump, and wing patches are pink mixed with brown. Forages on ground and in shrubs, grasses and snowfields. Eats seeds and insects. Swift bounding flight, alternates rapid wing beats with wings pulled to sides.
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Black-throated Blue Warbler: Small warbler that is the most strikingly sexually dimorphic of all wood warblers. Male has dark blue upperparts, black throat and mask. White underparts with black sides and white wing patch at base of primaries. Bill, legs and feet are black. The female is olive-brown.
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Brewer's Sparrow: Medium sparrow with finely streaked gray-brown upperparts, pale eye-ring, dark moustache stripe, and plain, pale gray underparts. Bill is pink with dark tip. Legs and feet are gray-pink. Short flights with rapidly beating wing strokes alternating with wings pulled briefly to sides.
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Black-and-white Warbler: Small, black-and-white striped warbler with a white median head stripe bordered by black. Black bill, legs and feet. It forages unlike any other warbler by moving up and down the trunks of trees and crawling under and over branches in a style similar to that of a nuthatch.
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Black-chinned Sparrow: Medium sparrow, plain, dark gray with brown-streaked back, pale gray belly, black chin and pale eyestripe. Bill is pink. The legs and feet are yellow-gray. Forages in brush and on ground. Short flights on rapidly beating wings alternating with periods of wings pulled to sides.
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Brown-headed Cowbird: Small blackbird with glossy brown head, heavy bill, and dark eyes. The black body has a faint green sheen. Walks on ground to forage and holds tail cocked over back. Feeds on caterpillars, insects, spiders, fruits, grains and seeds. Swift direct flight with rapid wing beats.
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Brown Creeper: Small, tree-clinging bird with brown-streaked upperparts and white underparts. White line over eye and long, decurved bill are conspicuous. Legs and feet are pink-buff. Feeds on insects, larvae, nuts and seeds. Strong direct flights of short duration on rapid and shallow wing beats.
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Bewick's Wren: Small wren with unstreaked, gray to red-brown upperparts and plain white underparts. White eyebrows are conspicuous. Tail is long and white-edged with dark bars. Bill is long and slightly decurved. Legs and feet are gray. Eastern populations have seriously declined since the 1960s.
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Black-headed Grosbeak: Large, stocky finch, black-streaked, orange-brown back, black head, wings, tail. Breast is orange-brown and belly is yellow. Wings have conspicuous white patches. Black legs, feet. Forages on ground and in trees and bushes. Eats insects, caterpillars, seeds, fruits and berries.
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Bullock's Oriole: Medium oriole, mostly bright orange with black crown, eye-line, throat stripe, back, and central tail. Wings are black with large white patches. Forages in trees and bushes. Feeds on insects, caterpillars, fruits and berries. Sips nectar. Strong direct flight with rapid wing beats.
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Barn Swallow: Medium swallow with glittering blue-black upperparts, red-brown forehead, chin and throat. Dark blue-black breast band, belly is white to orange. Tail is deeply forked with long outer streamers. Black legs and feet. It is the most abundant and widely distributed swallow in the world.
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Black Phoebe: Medium flycatcher, mostly black body and white belly. Outer tail feathers and undertail coverts are white. Bill, legs, feet are black. Feeds primarily on insects, sometimes small fish. Weak fluttering bouyant flight with shallow wing beats. Sallies from perch to catch insects in air.
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Baird's Sandpiper: Medium sandpiper with scaled, gray-brown upperparts, white underparts, and dark-spotted, gray-brown breast. Crown, face, and neck are buff with fine, dark brown streaks. Rump is white with dark central stripe extending through the center of gray-brown tail. Black legs and feet.
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Bristle-thighed Curlew: Large, brown-streaked shorebird with long decurved bill. Eye-line is dark, contrasting eyebrow is white. Rump is cinnamon-brown. Bristle-like feathers at base of legs are inconspicuous. Legs and feet are blue-gray. Strong, swift direct flight with legs trailing behind tail.
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Bar-tailed Godwit: Large shorebird, long upcurved bill, scaled brown, black and gray mottled upperparts, pale red-brown underparts. Tail is white with distinctive dark bars. Legs, feet are dark gray. Feeds by wading in water, probing mud with side-to-side motion. Direct flight with steady wingbeats.
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Black Rail: Smallest North American rail, mostly dark gray or nearly black with white-speckled back, belly, flanks. Nape and upper back are chestnut-brown. Eyes are red. Eats seeds of aquatic plants, grasses and grains, insects and small marine crustaceans. Weak fluttering flight with legs dangling.
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Blue-headed Vireo: Medium-sized vireo with olive-green upperparts, white underparts, and yellow flanks. Head has blue-gray hood, white spectacles, and white throat. The wings are dark with two white or pale yellow bars. Weak, fluttering flight with rapid wing beats. May hover briefly.
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Bobolink: Small, lark-like blackbird, all-black except for buff nape, white rump, and white wing patches. Tertials and wing coverts are lined with buff. Tail feathers are sharply pointed. Legs and feet are gray. Eats caterpillars, insects, seeds and grains. Strong undulating flight.
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Baltimore Oriole: Small oriole, mostly bright orange with black hood and back. Wings are black with orange shoulder patches and strongly white-edged feathers that appear as bars. Black base, center form T-shaped mark on orange tail. Strong swift and direct flight on rapid wing beats.
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Black-throated Sparrow: Medium sparrow, gray-brown upperparts, white underparts, black bib. Head has dark gray cap and sharply contrasting white eyebrow and cheek stripe. Bill is black. Long, round-tipped tail is edged with white. Legs and feet are gray. Forages on the ground and in low vegetation.
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Blackpoll Warbler: Medium-sized warbler with black-streaked, gray upperparts, white underparts, and black-streaked white sides. Head has black cap and prominent white cheek patch. Bill is black. Wings are dark with two white bars. Pink legs and feet. Swift, direct flight with rapidly beating wings.
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Buff-breasted Sandpiper: Medium sandpiper, buff wash over entire body except for white vent. Upperparts are black-spotted and streaked, underparts are slightly scaled. Shows white wing linings in flight. Has white eye-ring and black bill. Legs are yellow. Swift direct flight with rapid wing beats.
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Bay-breasted Warbler: Medium-sized warbler with dark-streaked gray upperparts and buff underparts with chestnut-brown patches on the chin, throat, breast and flanks. The head has a dark brown crown and black mask. Wings are black with two white bars. It is one of the largest warblers.
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