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Acadian Flycatcher: Small flycatcher with olive-gray upperparts, pale gray throat, distinctive pale yellow eye-ring, white lower breast, yellow belly, undertail coverts. Wings are olive-gray with two buff wing bars. Long broad-based bill with yellow-orange lower mandible. Black legs, feet.
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Audubon's Shearwater: Small, stocky seabird with dark brown upperparts and white underparts. Underwing coverts are white. Tail is dark brown with short, gray undertail coverts. Bill is dark and legs and feet are pink. Fish and squid make up most of its diet. Alternates rapid wing beats with glides.
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American Tree Sparrow: Medium, gray-brown sparrow, black and rufous-brown streaks on back, wings. Crown, eyestripes, flanks are rufous-brown, contrasting with gray face. Pale gray breast with dark central spot, rufous-brown sides. Upper mandible is dark gray, lower mandible is yellow.
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American Dipper: Small, wren-like bird, dark gray with short, cocked tail, white eyelids that flash when blinked. Straight black bill. Wades, swims and dives for food. Feeds on aquatic insects, larvae, clams, snails, crustaceans, and small fish. Strong direct flight on rapid wing beats.
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Ashy Storm-Petrel: Small seabird, gray-black overall, dark bill, forked tail. Gray wash on underwing coverts are visible at close range. Legs and feet are dark gray. Unlike most storm-petrels, it doesn't travel far from colonies after breeding. Flight is fluttering and direct on shallow wing beats.
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Anhinga: Large, dark waterbird with long tail, snake-like neck, small head, red eyes, and long olive-brown bill. Body is green-black overall with silver-gray feathers appearing speckled and grizzled on upper back and forewings. AKA snakebird and water turkey. Often soars like a raptor.
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Abert's Towhee: Large, stocky, shy sparrow. Distinct black face, pale gray bill, gray-brown upperparts, paler gray-brown underparts, and rust-brown vent. Tail is long and darker than upperparts with rust-brown undertail coverts. Short flights, alternates rapid wing beats with wings pulled to sides. May be difficult to spot because it prefers to stay well-hidden under bushes.
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Aleutian Tern: A medium tern, with white forehead, black cap, bill, and legs, gray under and upperparts, white rump and tail. Undertail coverts, cheeks, and area below cap are white. Wing projects beyond tip of tail at rest. Strong direct flight with deep wing beats, often high above water.
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Asian Brown Flycatcher: Small gray-brown flycatcher with white underparts, gray-brown wash on sides, breast. Long gray-brown wings have faint, pale wing bar. Black bill with creamy pink base to lower mandible. Gray face has a white buff eye-ring, lores. Dark gray tail has white undertail coverts.
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American Woodcock: Medium, stocky sandpiper with buff-brown underparts and dark-streaked gray-brown upperparts. Head shows black bars rather than the stripes of most other sandpipers. Eyes are black and very large; bill is dull yellow with a black tip and is long and stout. Pale gray legs and feet.
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Anna's Hummingbird: Medium hummingbird; male has bronze-green upperparts, dull gray underparts. Hood and throat are iridescent red, may appear black or dark purple in low light; broken white eye-ring is usually visible. Tail is dark green with black outer tail feathers. Feeds on nectar, insects, spiders, and sap.
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Ancient Murrelet: Small, pelagic seabird with black head and dark gray back and wings. White underparts extend up onto the face as a cheek patch. Bill is short and yellow with a blackish tip. An open ocean species vaguely resembling a small penguin that can fly. Swift, direct, and low flight.
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American Robin: Large, familiar North American thrush, gray-brown upperparts, rich red-brown breast, and white lower belly and undertail coverts. Head appears black with white splotches surrounding the eyes, and throat is white with black streaks. Swift, direct flight on rapidly beating wings.
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American Kestrel: Smallest North American hawk, has two distinct black facial stripes, rust-brown tail and back, slate-blue wings, black-spotted underparts. Eats bats, rodents, insects, frogs, small reptiles, and birds. Alternates several rapid wing beats with glides, also hovers. Soars on thermals.
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American Coot: Medium-sized, chicken-like swimming bird, dark gray to black overall, short, white bill and undertail coverts. Toes are lobed, not webbed. Upper edge of frontal shield is red, but usually only visible at close range. Swift direct flight with rapid wing beats, feet protrude past tail.
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Aplomado Falcon: Medium falcon with slate-gray upperparts, plain white breast. White, moustache-striped face has pale eyebrows joining at back of head. Belly and legs are cinnamon-brown. Long tail banded with white and black (or gray) stripes. Swift, direct flight with deep wing beats, also hovers.
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Arctic Tern: Medium, slim tern with gray upperparts, black cap, white rump and throat, and pale gray underparts. Tail is deeply forked and white with dark edges on outer feathers. Bill is dark red, rarely tipped with black. Legs and feet are red. Bouyant graceful flight with steady wing beats.
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Ash-throated Flycatcher: Medium flycatcher with gray-brown upperparts, pale gray throat and breast, and gray-brown tail with rufous highlights. The pale yellow belly distinguishes this species from other Myiarchus flycatchers. Bill, legs, and feet are black. Strong flight with shallow wing beats.
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Arctic Loon: Medium loon with straight, stout bill, white-spotted black back, white flanks visible above water while swimming. Head and nape are gray. Neck has bold black and white stripes on sides and green or purple throat bar that may be difficult to see. Feeds on fish, mollusks, and crustaceans.
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American Pipit: Small pipit, gray-brown upperparts and pale buff underparts; breast is faintly to darkly streaked. Tail is dark with white edges. Black bill is thin and long. Legs and feet are black. It can be distinguished from sparrows by its longer bill and habit of wagging its tail up and down.
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