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Least Flycatcher: Small flycatcher with olive-gray upperparts, gray breast, and pale yellow belly. Eye-ring is white. The bill has pale lower mandible with dark tip. Legs and feet are black. Feeds on insects, spiders, berries and seeds. Weak fluttering direct flight with shallow wing beats.
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Laughing Gull: Medium gull, gray back, white underparts. Head has black hood, neck is white, and bill is red. Wings are gray and white-edged and black at tips; tail is white. Legs and feet are black. Slow flight with deep wing beats. Soars on updrafts. Named for its laughterlike call.
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Lesser Nighthawk: Medium-sized nightjar with gray and white mottled upperparts, white throat, and brown and white mottled underparts with dark belly bars. Wings are dark with conspicuous pale patches visible in flight. Tail is dark brown and has thin white bars across top. Darting erratic flight.
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Le Conte's Sparrow: Small sparrow, brown-streaked back, brown-streaked gray nape, pale gray underparts with streaks on sides, yellow breast. Head is flat, black-capped with a white median line. Face is yellow-orange with gray cheeks, black eye-line forming a T behind eye. Legs, feet are pink-brown.
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Little Gull: The smallest of all gulls, with pale gray upperparts and white nape, neck, breast, belly, and tail. Hood is black and extends onto upper neck. Underwings are dark. Bill is dark red with black tip. Legs and feet are red-orange. Strong direct flight with deep wing beats.
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Lincoln's Sparrow: Medium sparrow, dark-streaked pale brown upperparts, white underparts with dark streaks. Head has brown crown with gray central stripe, broad gray eyebrows and nape, pale eye-ring, and brown streak extending behind eye. Upper mandible is dark, lower mandible is pale orange-brown.
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Least Storm-Petrel: Small, very rare storm-petrel with dark black-brown body and short, wedge-shape tail. The wings have black wing tips and pale brown diagonal bars visible in flight. It is the smallest Pacific storm-petrel. Flight is swift and direct on deep wing beats. Often flies low over water.
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Lark Sparrow: Medium sparrow with streaked, gray-brown upperparts and buff underparts with black breast spot. Head has black, white, and chestnut-brown stripes. Tail is long and black with white edges. Short, fluttering flight, alternates rapid wing beats with wings pulled to sides.
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Lapland Longspur: Medium sparrow-like bird, brown-streaked black back. Underparts are white, streaked black on sides, flanks. Crown, face, and throat are black; nape is red-brown. Broad white stripe from eye to sides of breast. Bill is yellow with dark tip. Tail is long, white edges.
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Least Grebe: Smallest of North America's grebes. Eyes dark yellow , plumage is dark black-gray, white undertail coverts and white wing patch in flight. Black bill. In winter shows white throat, in summer a dark throat. Seldom fly, rarely leave nesting places. When not nesting found in small flocks.
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Little Ringed Plover: Small, slim plover with brown upperparts and white collar. Bill, lores, forehead, auriculars, and breast band dark, contrasting with white forecrown and white bar behind the dark crown. Conspicuous eye-ring is yellow; legs are dull pink-yellow. Does not show wing bar in flight.
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Large-billed Tern: Dark gray mantle and short dark gray tail; black cap; white breast, belly, chin, cheeks, and throat; black primaries to the bend of the wing are striking in flight; white secondaries; distinctive large yellow bill. Yellow legs, feet. Direct flight with strong shallow wing beats.
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Ladder-backed Woodpecker: Small woodpecker with black-and-white barred upperparts, shoulders, and wings, underparts are buff-gray with black spots, buff-gray face, red crown, and black forehead, nape, rump, and tail. Outer tail feathers are white barred. Bill, legs and feet are black.
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Lark Bunting: Large sparrow, nearly black with large white wing patches, short, white-edged tail, and heavy, blue-gray bill. Forages in groung, low vegetation. Strong flight, alternates shallow wing beats with brief periods of wings pulled to sides. It is the state bird of Colorado.
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Loggerhead Kingbird: Large flycatcher, olive-brown upperparts, dark head with inconspicuous yellow crown patch, white underparts, and pale yellow wash on lower belly. Wings are brown-black with white edges; tail is brown-black with buff-edged tip. Feeds on insects, berries and lizards.
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Lewis's Woodpecker: Medium woodpecker with black upperparts, hood. Face is dark red, collar is gray, belly is pale red. The bill, legs and feet are black. It was named for Meriwether Lewis of the Lewis and Clark expedition. Its dark plumage sets it apart from all other North American woodpeckers.
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Least Auklet: Very small seabird with black upperparts, small white plumes behind eyes, and black-mottled white underparts. Throat is white. Bill is short and red with a white tip. The legs and feet are gray. Feeds on zooplankton and crustaceans. Swift and direct flight low over the water.
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Loggerhead Shrike: Medium shrike with gray upperparts and paler gray underparts. Mask is black and throat is white. Bill is heavy and slightly hooked. Wings are black with white patches. Tail is long, black, and white-edged. Low, swift flight, alternates rapid wing beats with wings pulled to sides.
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Lawrence's Goldfinch: Small finch with gray nape and back and yellow-gray rump. Underparts are white; breast is yellow. Cap and face are black. Wings are dark with bright yellow bars. Feeds on seeds and insects. Swift bounding flight, alternates rapid wing beats with wings pulled briefly to sides.
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Lesser Goldfinch: Small finch with dark back (black in the east, dark green in the west), black crown, bright yellow underparts. Wings, tail black with white markings. Forages in shrubs, brush, weedy fields for seeds and insects. Swift flight, alternates rapid wing beats with wings pulled to sides.
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Least Bittern: Very small, secretive heron with black cap and back, and white throat and belly. Wings have conspicuous pale brown patches visible in flight. The bill, legs and feet are yellow. Feeds on fish, insects, small amphibians, crustaceans and invertebrates.
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Lesser Scaup: Medium diving duck with finely barred gray back and gray-washed white underparts. Head, neck, and breast are black with purple gloss. Eye is yellow. Bill is blue-gray. Wings are black with large, white patches; tail is black. Dives for food. Swift direct flight with rapid wing beats.
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Lesser Sand-Plover: Medium-sized, chunky plover with gray upperparts, white underparts, and bright rust-brown breast band and nape. The head has gray-brown cap and thick black eyestripe broken by a white forehead. Throat is white with a black border. Bill is black and legs and feet are yellow-green.
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Least Tern: Small tern, slate-gray upperparts, white underparts. Crown, nape are black and forehead is white. Black leading edge of outer wing conspicuous in flight. Tail is forked. Bill and feet are yellow. Fast smooth flight with rapid wing beats. Hovers briefly before dipping down to sieze prey.
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Laysan Albatross: Large seabird with dark brown back and white head, neck, and rump. Eye patch is dark. Bill is thick and yellow with gray, hooked tip. Wings are dark brown above and white below with irregular brown-black borders. Tail is dark brown-black with white coverts. Legs and feet are pink.
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Long-billed Dowitcher: Large, stocky sandpiper with dark, mottled upperparts, dark cap and eyestripe, short white eyebrow, and red-brown underparts with lightly barred flanks. Bill is long, dark, and dagger like. Legs and feet are yellow-green. Swift direct flight, rapid wing beats.
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Little Stint: Medium sandpiper, scaled-brown upperparts, white underparts. Face, neck, breast are rust-brown with black spots. The back has white lines that form a V pattern in flight. Black bill, legs, feet. Feeds by pecking at surface and probing mud with bill. Direct flight with rapid wing beats.
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Long-tailed Jaeger: Small jaeger with gray upperparts, white breast, gray belly. Black cap covers eyes, crosses chin and ends at yellow nape. Upperwings are dark-edged. Tail is gray with black edges and long, black streamers. Legs are blue-gray and toes are webbed. Hovers before dipping for prey.
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Long-billed Murrelet: Small seabird with dark brown upperparts and darker brown barring, paler throat and white eye-ring. Underparts are lighter brown with brown barring. Straight black bill. Legs and feet are brown. Strong fast direct flight, often close to the water on rapid wing beats.
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Long-tailed Duck: Small diving duck, black upperparts, head, neck, breast, wings; back is black and brown mottled; white flanks, belly, undertail coverts. Black tail has long, pintail-like central feathers that are often submerged when swimming. Pale gray mask, black bill with dark pink saddle.
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