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Browsing is a valuable way to learn about birds, however it is a brute force approach and not designed for identification. A more sophisticated approach to finding a bird with specific field marks is to use the Step by Step Search. You can also try the Wizard to find a bird, which uses a question and answer approach, but again it does not give you the flexibility of the Step by Step Search.

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Cattle Egret
Cattle Egret: Small, stocky egret with a white body and pale orange-brown patches on the head, neck and back. The eyes, bill and legs are orange. This is the only white egret with both a yellow bill and yellow legs. It feeds primarily on insects. It has a direct flight on quick steady wing beats. The sexes are similar.
Canada Goose
Canada Goose: This long-necked goose has a large gray-brown body, large webbed feet and a wide flat bill. It has dark upperparts, paler underparts, a white vent, cheeks and chinstrap, and a black head and neck. Strong deep wing beats. Strong powerful direct flight. Flies in a in V formation in migration. Feeds on grasses, sedges, berries and seeds. Sexes are similar, but males are larger.
California Gull
California Gull: This is a medium-sized gull with a white head and underparts, gray wings and black wing tips. The bill and legs are yellow, and it has a red eyering. It has a strong direct flight with deep wing beats. It feeds on worms, mice, other birds and their eggs, and garbage. The sexes are similar, but the males are usually larger than females, with a larger bill, head and tarsi.
Calliope Hummingbird
Calliope Hummingbird: Very small hummingbird, metallic green upperparts and flanks, white underparts. Throat feathers are long, purple-red, appearing as streaks on a white background, whiskers when fluffed out, or dark, inverted V when folded. Direct and hovering flight with very rapid wing beats.
Costa's Hummingbird
Costa's Hummingbird: Medium hummingbird with green back, pale gray underparts and dull green flanks. Crown and throat patch are brilliant metallic purple. Straight black bill. Tail is green with black outer tail feathers. Legs and feet are black. Feeds on nectar, spiders, sap and insects. Direct and hovering flight with very rapid wing beats.
Clark's Grebe
Clark's Grebe: Large grebe, gray-black upperparts, white underparts, and slender neck with white on front and black on back. White face, black cap extends nearly to red eyes. Bill is yellow-orange. Until the 1980's thought to be a pale morph of the Western Grebe. Direct flight on rapid wing beats.
Common Nighthawk
Common Nighthawk: Medium nightjar with white-speckled, dark upperparts, black-and-white barred underparts, mottled breast, white throat. Wings are long, dark gray with white bars, nearly covering tail when folded. Gray-brown legs and feet. Darting erratic flight with frequent changes of direction.
Caspian Tern
Caspian Tern: This large stocky tern has pale gray upperparts and white underparts. The cap is black and may appear weakly crested. The large bill is coral-red, the undersides of the primaries are gray, a short white tail is slightly forked, and the legs are black. The flight is strong, swift and graceful. It hovers above water before diving and mainly feeds on fish. The sexes are similar.
Clapper Rail
Clapper Rail: Large, noisy marsh bird, gray or brown upperparts, vertical white-barred flanks and belly, buff or rust-brown breast. Bill is long, slightly decurved. Gray legs, feet. Feeds at low tide on mudflats or hidden in salt marsh vegetation. Flight is low and fluttering over short distances. In 2016 the American Ornithologist Union split the Clapper Rail into three species, the Clapper Rail, Ridgway's Rail and Mangrove Rail (not in North America).
Common Gallinule
Common Gallinule: Medium, chicken-like marsh bird with gray-brown back and slate-gray head, neck, breast, and belly. Upper flanks show distinct white line. Yellow-tipped red bill is short with red frontal plate extending onto forehead. Tail is white below. Long legs and unwebbed feet are yellow-green.
Common Tern
Common Tern: This medium-sized tern has medium gray upperparts, pale gray underparts and a glossy black cap and nape. The wings are dark-tipped with a dark leading edge on the forewing. The red bill is black-tipped, legs are red, and the tail is deeply forked and elongated. It has a direct flight, hovering above water before diving for prey. Feeds mainly on small marine fish. Sexes are similar.
Curlew Sandpiper
Curlew Sandpiper: This is a medium-sized sandpiper with mottled rufous, white and black upperparts. The head, neck and breast are a rich rufous, while vent, under tail coverts and underwings are white. It has a long black bill that is slightly decurved, and black legs and feet. It mainly feeds on insects and other small invertebrates. Swift direct flight with rapid wing beats. Sexes are similar.
Cerulean Warbler
Cerulean Warbler: The male is sky-blue with faintly streaked upperparts and black-streaked white flanks. A black band separates a white throat and belly. Wings have two bold white bars. The female has unstreaked blue-gray upperparts and a yellow wash on face and breast with pale streaks on flanks, and yellow eyebrows. The immature bird is paler and more olive over all. Prefers to stay high in the crowns of mature deciduous trees, making it difficult to see.
Common Grackle
Common Grackle: Medium-sized blackbird with metallic purple sheen on back, head, neck, and breast. Eyes are bright yellow. Central feathers of long, rounded tail are often lowered to show keeled V-shape. Swift, strong direct flight with rapid wing beats, holds tail folded in a V shape while flying.
Cook's Petrel
Cook's Petrel: This small petrel has a slate-gray back and upperwings marked by a black M-pattern, white underparts, under wings, and face with a small dark eye patch, black bill, blue-gray legs and feet, long slender wings, and a gray tail with black-tipped central feathers and white edges. It feeds mostly on fish and squid. Rapid and erratic flight. Sexes are similar.
Carolina Wren
Carolina Wren: Medium-sized wren with rufous upperparts and buff underparts. Eyebrows are white, wings and tail are dark barred with white flecks. Throat and chin are white. Bill is decurved. Legs and feet are pink-gray. Range expands north when winters are mild and retracts south when harsh.
Crimson-collared Grosbeak
Crimson-collared Grosbeak: Large finch with blood-red body, brown-red back, black hood, bib, huge conical bill, and dark wings. Female has black hood and bib but body is olive to olive-yellow. Forages in brushy woodland. Feeds on insects, larvae, seeds, fruits, berries. Short flights, alternates rapid wing beats with wings pulled briefly to sides.
Common Chaffinch
Common Chaffinch: Medium finch. Buff body. Crown and nape are blue-gray; belly and vent are white. Dark wings with white shoulder patches and single white bars. Forages in trees, bushes. Eats seeds and insects. Bounding flight, alternates rapid wing beats with wings pulled to sides.
Common Rosefinch
Common Rosefinch: Small, stocky finch, red upperparts and breast, faintly streaked brown back, white underparts. Bill is dark gray and stout. Wings and tail are dark brown. Legs and feet are gray-brown. Forages on ground and in trees and shrubs for seeds and insects. Bounding flight.
Common Redpoll
Common Redpoll: Small finch, brown-streaked gray upperparts, bright rose-pink breast, boldly streaked flanks and undertail coverts. Red cap and black chin. Bill is olive-brown with fine black tip. Wings are dark with two narrow white bars; tail is black and notched. Black legs, feet.
Crissal Thrasher
Crissal Thrasher: Large thrasher with gray-brown upperparts and unstreaked, gray underparts. The throat is white with dark moustache stripe, eyes are yellow, and black bill is long and strongly decurved. Tail is very long with chestnut-brown undertail coverts. Legs and feet are black.
Curve-billed Thrasher
Curve-billed Thrasher: Medium-sized thrasher (palmeri), with gray upperparts and spotted, pale gray underparts. Eyes are orange-red and bill is long and decurved. Tail is long and dark gray. Legs and feet are black. Feeds on insects, spiders, small reptiles, fruits, seeds and berries.
Clay-colored Thrush
Clay-colored Thrush: Large thrush with olive-brown upperparts, buff throat has faint brown streaks, and pale brown underparts. Bill is yellow-green and black-tipped. The legs and feet are gray-black. Direct, swift flight on rapidly beating wings. It is the national bird of Costa Rica.
Cassin's Vireo
Cassin's Vireo: Small vireo, olive-gray upperparts, white underparts, pale yellow flanks. Head is gray with white eye-ring that extends to brow. Wings are dark with two white bars. Until the 1990s was classified as the Solitary Vireo, along with the Blue-headed and Plumbeous Vireos.
Cave Swallow
Cave Swallow: Small swallow (Southwest pelodoma), with steel-blue upperparts, white underparts, rufous wash on breast and sides. Forehead is chestnut-brown and throat and rump are buff. Tail is square. Swift, graceful flight, alternates several rapid, deep wing beats with long curving glides.
Cactus Wren
Cactus Wren: The Interior adult has black-and-white streaked reddish-brown back, dark crown with distinctive white stripe over eye, white chin, and heavily spotted white underparts with buff wash on sides and belly. Wings and tail are dark with white bars on sides. Bill is long and slightly decurved. Sexes are similar. Juvenile has fewer and paler breast spots and shorter tail. The Coastal adult is similar to the Interior adult with a darker wash on sides and belly.
Canyon Wren
Canyon Wren: Medium wren with rust-brown upperparts, fine white spots on gray-brown back, nape, and crown, white throat and breast, and chestnut belly. Tail is long and brown with thin black bars. Head has a flattened appearance; bill is long, slender, and slightly decurved.
Carolina Chickadee
Carolina Chickadee: Small chickadee with gray upperparts, distinct black cap and bib, dull white cheeks, and white underparts with rust-brown flanks. Short, black bill. When disturbed in its nest during incubation, it will hiss and strike intruders, similar to how a snake would act.
Cordilleran Flycatcher
Cordilleran Flycatcher: Small flycatcher with olive-brown upperparts, yellow throat and belly separated by olive-gray breast, elongated white eye-ring, and pale wing-bars. Black bill is long and wide, and lower mandible is bright yellow. Weak fluttering flight with shallow wing beats.
Couch's Kingbird
Couch's Kingbird: Large flycatcher, olive-green upperparts, gray head, dark eye patch, white throat, bright yellow underparts. Wings and slightly forked tail are dark. Black legs and feet. Difficult to distinguish from Tropical Kingbird. Slow fluttering flight on shallow wing beats.
Cuban Pewee
Cuban Pewee: Small flycatcher, gray upperparts, dark gray head with bushy crest and white crescent behind eye, and pale yellow underparts. Wings are dark with two faint bars. Upper mandible is black while lower mandible is yellow. Legs and feet are black. Feeds mostly on small insects.
Common Cuckoo
Common Cuckoo: Large cuckoo, gray upperparts, paler underparts with dark bars on belly. Dark gray wings; tail is dark gray with spotting on outer edges near base. Feeds on caterpillars, insects and larvae. Wings are held low in flight, depressed far below body at bottom of downstroke.
Common Swift
Common Swift: Medium-sized swift, dark brown overall with white chin and dark, deeply forked tail. Bill is black, legs and feet are gray. Swift, dashing flight on stiff, rapidly beating wings, alternating with gliding. Can reach speeds of 137 mph and spends most of its life in midair.
Common Greenshank
Common Greenshank: Large sandpiper with scaled gray-brown upperparts, white rump, and white underparts, streaked and spotted with brown on flanks and sides. Yellow-green legs. Bill is slightly upturned. Eats small fish, insects and larvae. Swift direct flight with clipped wing beats.
Common Redshank
Common Redshank: Large sandpiper, scaled black and brown upperparts, dark-streaked neck and breast, white eye-ring broken in front, pale belly and sides with dark chevrons. Dark wings with white trailing edges visible in flight. Legs are orange-red. Short bill is red with black tip.
Common Sandpiper
Common Sandpiper: Eurasian counterpart to the Spotted Sandpiper; has dusky gray upperparts, heavily streaked breast, and sparkling white underparts. Best distinguished by its habit of standing in a semi-crouch and bobbing back and forth. Flies low over water with stiff shallow wing beats and glides.
Common Snipe
Common Snipe: Longest-billed of all snipes, best identified by broad white stripe at base of underwing. Upperparts cryptically colored with brown and yellow-brown streaks of many different shades. Underparts white but strongly suffused with orange wash, heavily barred and streaked with dark brown.
Common Ringed Plover
Common Ringed Plover: Plump little plover with dark gray-brown upperparts, pure white underparts, and strong black mask and chest band. Base of dark-tipped bill and legs are bright orange. Frequents mudflats. Eats worms, aquatic insects, crustaceans and mollusks. Direct flight with rapid wing beats.
Corn Crake
Corn Crake: Medium rail, buff-yellow overall with brown-barred flanks, conspicuous chestnut wing patch, gray head and neck with dark crown, yellow bill. Eats worms, insects, snails, slugs, sometimes seeds and grains. Weak flight with legs dangling, drops back into vegetation after a short distance.
Common Pochard
Common Pochard: Medium-sized, colorful diving duck from Eurasia with a rich red-brown head, black breast and tail, and gray body. Dark bill has a pale gray saddle; eyes are red. Feeds on aquatic plants, dives often, sometimes dabbles. Swift direct flight on rapid wing beats. Flies in a V formation.
Cory's Shearwater
Cory's Shearwater: Large gray-brown shearwater, white underparts, pale yellow bill. Feeds at night on crustaceans and large sqiud it takes from the surface. Best identified by its relatively slow, languid flight compared to other shearwaters. Wings held downward. Soars on fixed wings if wind is up.
Crescent-chested Warbler
Crescent-chested Warbler: Small warbler, gray to blue-gray head, wings, tail. Yellow-green back, breast, throat are yellow with a rufous-brown spot or crescent on upper breast; belly and sides are white to gray. Head has white eyebrows that widen towards nape and partial lower eye-ring.
Common House-Martin
Common House-Martin: Small swallow, metallic dark blue mantle and crown; wings and tail are black-gray. Forked tail. Solid white rump distinguishes it from other swallows. Legs covered in white down. Flight is graceful, swift and direct on rapidly beating wings. It soars on wide triangular wings.
Common Eider
Common Eider: Large diving duck (v-nigrum), with distinctive sloping forehead, black body, white breast and back. Crown is black and nape is pale green. Wings are white with black primary and secondary feathers. Tail and rump are black. Bill is dull yellow to gray-green (eastern) or orange-yellow (western).
Cinnamon Hummingbird
Cinnamon Hummingbird: Medium size, bicolored hummingbird with bronze green upperparts and cinnamon colored underparts. The tail is square, rufous with gold-green edging. This promiscuous bird attracts a female by flying back and forth like a swing. Both sexes are protective of feeding territories.
Chestnut-bellied Sandgrouse
Chestnut-bellied Sandgrouse: This sandgrouse is very common in Africa and India. It has buff to light brown upperparts, chestnut underparts and face, a black narrow breast-band, mottled back and wings, darker brown primaries, elongated central feathers on the tail and gray legs and feet. It feeds mainly on seeds. Fast and direct flight; long pointed wings allow for quick takeoff.
Christmas Shearwater
Christmas Shearwater: This is a small to medium-sized bird with entirely black brown plumage that is slightly paler below. It has pale fringing to some of the feathers on the back and gray legs and feet. It has a short, narrow and slightly hooked black bill. In flight, alternates glides with rapid wing-beats. It feeds mainly on the larval forms of fish and squid. The sexes are similar.
Collared Kingfisher
Collared Kingfisher: Medium kingfisher with blue back, wings, and tail, white underparts and collar, brown-blue crown, white lores, and black mask. Large, black-gray bill with pink-buff base has slightly upcurved mandible. Medium tail. Female like male but slightly duller blue plumage. Juvenile has black collar and some black scaling on breast.
Chestnut-cheeked Starling
Chestnut-cheeked Starling: Small starling with buff-white head, chestnut on cheeks and throat, black-purple back, buff-white rump, long, black-green and white wings, gray breast and flanks, and white belly. Short, forked tail. Female and juvenile pale, gray-brown with black flight feathers and bill, and white shoulder, belly, and vent.
Citrine White-eye
Citrine White-eye: Small, warbler-like bird, olive above, yellow below. Orange-brown eye with black line through eye and white spectacles. Sharp, slightly curved bill black above, orange below. Small to medium wings with black-gray on primaries and tertials. Short to medium tail has rounded tip. Sexes similar, juvenile like adult but duller.
Cattle Egret (Palau)
Cattle Egret (Palau): Small, short-necked and stocky egret with white body and pale orange-brown patches on head, neck and back. Sexes are similar. Breeding plumes are slightly shorter on the female. Breeding birds' legs are yellow-green and irises are dark yellow. During peak breeding season, bill, legs and irises turn a bright red. Winter adult and juvenile are white and with dull yellow-orange eyes and bill, legs are green-black. Races separated by the amount and intensity of the orange-brown patches.
Common Moorhen (Palau)
Common Moorhen (Palau): Medium, chicken-like rail with black-gray head, back, and underparts. Gray-brown back, wings, and tail. Short, white bars on flanks, white undertail with black stripe. Red frontal shield and bill with yellow tip. Short tail. Sexes similar. Juvenile like adult but brown, white on throat, no red on head, and yellow-brown bill.
Common Ringed Plover (Palau)
Common Ringed Plover (Palau): Plump little plover with dark gray-brown upperparts, pure white underparts, and strong black mask and chest band. Base of dark-tipped bill and legs are bright orange. Female has a brown cast in the black bands. Juvenile resembles female but has even more of a brown cast; also has dull orange bill and legs.
Common Tern (Palau)
Common Tern (Palau): Medium-sized tern with medium gray upperparts, pale gray underparts sometimes with some pink early in breeding season; glossy black cap and nape. Wings are dark-tipped and have dark leading edge on fore wing. Red bill is black-tipped. Legs are red and tail is deeply forked and elongated, tail reaches wingtips at rest. Sexes are similar. Winter adult and juveniles have white forehead, black crown with white streaks; prominent dark bar on lesser coverts; underparts gray; black bill with red base; legs duller red to black-red.
Common Teal
Common Teal: This small dabbling duck has pale, gray-barred sides and a buff spotted breast. Lacks the white bar down the side that the Green-winged Teal has in North America. The head is chestnut-brown with a green ear patch, the bill is dark gray, and the legs and feet are olive-gray. The speculum is flashy green bordered with brown above and white below. Diet includes seeds, insects and grasses. Flight is often low and erratic.
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