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Wood Thrush: Medium thrush, rust-brown upperparts, white underparts with heavy dark brown spots. Eye-rings are white. Black bill has creamy pink base on lower mandible. In the early 1900s, its range began to expand north, forcing the Veery and Hermit thrushes to find another habitat.
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Wilson's Snipe: Medium sandpiper, brown and black mottled upperparts, buff stripes on back. White underparts, dark bars on sides, flanks. Heavily streaked head, neck, breast. Dark brown wings, nearly black primaries. Black tail with broad, red-brown central bar, white tip. Yellow-green legs, feet.
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White-throated Robin: Large thrush, brown upperparts, gray underparts, white undertail coverts. Darker head has thin, yellow eye-ring. Bill is dark gray to yellowish. Brown-streaked white throat is bordered below with thick white crescent. Direct, swift flight on rapidly beating wings.
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White-winged Crossbill: Medium crossbill, bright pink overall except for black wings with two bold white wing-bars. Belly has dull white center; white undertail coverts. Black tail, deeply notched. Swift bounding flight, alternates rapid wing beats with wings pulled to sides.
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White-cheeked Pintail: Large, heavily spotted dark and light brown duck with striking white cheek patches, blue bill with bright red base, buff pointed tail. Legs and feet are blue-gray. Feeds on aquatic plants, small invertebrates. Swift direct flight with strong rapid wing beats. AKA Bahama Duck.
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Wood Sandpiper: Medium, long-legged sandpiper with dark gray-brown upperparts and breast heavily marked with white spots and notches. Underparts are white; legs usually green, but may be yellow and lead to confusion with Lesser Yellowlegs. Underwings pale gray; rump is white with black-barred tail.
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White-faced Storm-Petrel: The only Atlantic storm-petrel with the combination of dark gray upperparts and white underparts with a dark cap and eyeline. Long black legs trail behind squared tail in flight. Webbing between toes is yellow. Alternates rapid, shallow wing beats with stiff-winged glides.
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White-winged Parakeet: A medium-sized parakeet, green overall with yellow-and-white wing patches, and pale, teardrop-shaped eye-ring. The green tail is long and pointed. Hooked bill varies in color from yellow-pink to olive-brown. Legs and feet are pink-gray. Swift direct flight on rapid wing beats.
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White-tipped Dove: Medium dove, gray-brown upperparts, pale gray breast, white forehead and belly, chestnut-brown underwings, white-tipped tail. Black bill, red legs and feet. Feeds mainly from the ground. Walks on ground in dense understory. Swift direct flight with rapid wing beats.
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White-throated Needletail: Large swift, gray-brown overall with white throat and undertail. Wings are glossed with green. Tail is short and square, with protruding feather shafts giving a spiked appearance. Very swift flight with several rapid wing beats followed by swooping glides.
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White-eared Hummingbird: Medium hummingbird, iridescent green upperparts and throat, metallic violet head, black mask, white stripe with lower black border behind eye, and white belly. Bill is red with black tip. Feeds primarily on nectar. Direct, hovering flight with rapid wing beats.
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White-tailed Tropicbird: A large bird, white with long black bar on upperwing coverts, outer primaries. Black loral mask which extends through and past eye. Bill is yellow to orange. Tail streamers are white and can be up to seventeen inches long. Legs and feet are yellowish, black webbing on toes.
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White-winged Scoter: Medium sea duck, mostly black except for white eye patches, large white wing patches. Bill is orange with large black basal knob. Red-orange legs, feet. Dives to 40 feet, feeds primarily on shellfish. Direct flight with steady wing beats. Flies in straight line or V formation.
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Wood Stork: Large, odd wading bird, mostly white except for black flight feathers and tail. Upper neck and head are featherless and dark gray. The bill is thick, long, and curved downward. Legs and feet are gray black. Alternates between strong wing beats and gliding. Soars on thermals and updrafts.
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Whooping Crane: Large crane, nearly white except for red crown, black mask, and black primary feathers most visible in flight. Feeds on frogs, fish, mollusks, small mammals and crustaceans, grain and roots of water plants. Direct flight, slow downward wing beat and a powerful flick on the upbeat.
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White-tailed Kite: Small hawk with gray upperparts, black shoulders, and white face and underparts. Eyes are red, bill is black. Underwings are white and gray with dark patches at bend. Tail is square, pale gray, and shorter than folded wings. Legs and feet are gray. Soars on thermals and updrafts.
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Western Sandpiper: Small sandpiper, chestnut-brown, scaled upperparts, white underparts dotted with rows of dark chevrons. Head streaked with brown wash on face. Bill is dark and decurved at tip. Thin white stripes visible on dark wings in flight. Black legs and feet, partial webbing between toes.
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Willet: Large sandpiper with mottled gray-brown upperparts, white rump and lightly streaked and barred white underparts. Broad white stripes on black wings are visible in flight. Tail is white with dark brown tip. Legs are blue-gray. Flight is short and low, alternates rapid wing beats with glides.
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Williamson's Sapsucker: Medium-sized woodpecker with black back and white rump. Bright red throat, breast is black, belly is yellow, and flanks are barred black-and-white. Black head has two white facial stripes. Black wings have large white shoulder patches. Tail is black, legs and feet are gray.
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Western Wood-Pewee: Medium-sized flycatcher with dull olive-gray upperparts and pale olive-gray underparts. Head has darker cap and slight crest. The wings are dark with two white bars. Feeds on insects, spiders and berries. Quiet and solitary. Weak fluttering flight with shallow rapid wing beats.
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Wedge-tailed Shearwater Dark Morph: Large shearwater, dark brown overall with black-tipped, dark gray bill. Tail is long and pointed in flight and extends past the pink legs and feet, fans to wedge-shaped when banking turns or landing. The dark morph form is most often seen off the Pacific Coast.
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Wedge-rumped Storm-Petrel: Small storm-petrel, black-brown overall with large white patch on rump and central tail. Bill, legs, and feet are black. Feeds far out to sea. Flight is swift and direct, with deep wing beats and much banking and twisting. Often flies high above the surface of the water.
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White-throated Sparrow: Medium-sized sparrow with rust-brown striped upperparts, conspicuous white throat, and plain gray underparts. Head has black-and-white striped crown and yellow spots between eyes and bill. Short flights, alternates rapid wing beats with wings pulled to sides.
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Wandering Tattler: Medium sandpiper, solid gray upperparts and heavily black-and-white barred underparts. Face is finely streaked and eye line is dark. Long, black bill. White eye ring. Dull yellow legs and feet. Eats insects, larvae, worms and mollusks. Quick, direct flight with rapid wing beats.
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White-winged Tern: Small tern, black head, body, and underwing coverts; white rump, vent, upperwing coverts, and tail; flight feathers are pale gray. Bill is dark red to black; Red legs and feet. Fluttering, uneven flight with slow, shallow wing beats. Hovers before dipping for prey.
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Wilson's Phalarope: Medium sandpiper, gray-brown upperparts, red-brown streaks on back, shoulders. White underparts with red-brown markings on upper sides. Gray crown, white face, black eye-line that continues down neck. Black needle-like bill. Gray wings with dark flight feathers. White tail, rump.
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White-tailed Ptarmigan: Small grouse, mottled brown overall, white on wings, breast, belly, red eye comb, white-edged brown tail, legs covered with white feathers. It is the smallest of the ptarmigans, and the only one that nests south of Canada. Lives most of its life above timberline.
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Willow Ptarmigan: Small grouse, rust-brown upperparts, head, breast, white eye-ring, orange-red eye comb, white wings, belly, leg feathers; brown tail. Unlike other ptarmigans, the male stays with the female and defends its nest-it is known to attack anything that comes to close.
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White-eyed Vireo: Medium-sized, secretive vireo with olive-green upperparts, and white underparts with yellow sides and flanks. Spectacles are pale yellow and iris is white. Wings are dark with two white bars. Legs and feet are gray. Flight is fast and direct on short, rounded wings.
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Whip-poor-will: Medium-sized nightjar with gray-brown-black mottled upperparts and pale gray-black underparts. Throat is black; eyebrows and neckband are white. Tail is long and rounded with large white corner patches. Brown legs and feet. Erratic mothlike flight, flies close to the ground at night.
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