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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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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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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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Lesser Black-backed Gull: Medium-sized gull with dark gray back and wings. Head, neck and underparts are white. Rump and tail are white. Bill is yellow with red spot near tip. The wings have dark tips with white spots; legs and feet are yellow. Eyes are yellow with red orbital rings.
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Leach's Storm-Petrel: Medium storm-petrel with dark brown body and white rump and undertail feathers. Wings are dark with pale gray-brown bar on upperwings. Long tail is dark and forked. Bill, legs, and feet are black. Its flight is bounding and erratic, with frequent changes of direction and speed.
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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 Sandpiper: Small sandpiper, brown-scaled upperparts, rust-brown crown. Breast, throat are dark-spotted; belly, undertail are white. Wings have thin, white stripes visible in flight. Black line on rump extends onto tail. Legs and feet are yellow-green. Swift direct flight with rapid wing beats.
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Little Curlew: Medium curlew, brown-streaked upperparts, white throat, dark-streaked gray breast, and white belly. Head has brown crown, white eyebrows. Bill is short and slightly down-curved. Legs and feet are blue-gray. Forages in grassy fields. Bouyant direct flight with steady, 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-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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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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Lesser Yellowlegs: Large sandpiper with gray and black mottled upperparts, white underparts and streaked upper breast and sides. Bill is straight and uniformly dark gray. White lower rump and dark-barred tail are visible in flight. Legs are long and yellow. Swift direct flight with rapid wing beats.
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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-toed Stint: Medium sandpiper, scaled, brown, black and rufous upperparts, white-sided rump, white underparts, black-spotted sides, upper breast. Head has brown crown, white eyebrows. Dark decurved bill. Wings have white bars visible in flight. White tail has black central stripe, gray edges.
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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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Little Egret: Medium-sized, all white egret with plumes on head, breast, and back. Legs are black with yellow feet. Black bill, and yellow lores. Nonbreeding adult lacks head and back plumes, has gray lores, and shows yellow on lower legs. Difficult to distinguish from Snowy Egret. Flight is direct.
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Little Bunting: Small finch with dark-streaked gray-brown upperparts, heavily streaked white underparts. Face and crown are chestnut-brown and black-bordered. Eye-ring is dull white; throat is white. Wings have two pale, thin bars. Legs, feet are yellow. Tail has white outer feathers.
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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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Lanceolated Warbler: Medium warbler with streaked gray-yellow body. Underparts are white, brown streaked breast, flanks and undertail coverts. Brown legs, feet. Rare visitor to Alaska. Feeds on spiders, insects and their larvae. Direct flight close to the ground on shallow wing beats.
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Long-eared Owl: Medium-sized owl with gray-brown body with pale bars and heavy streaks on underparts. The facial disc is rufous with white a patch below the bill. The ear tufts are close together, long, black and rufous, and are not visible in flight. Bouyant, mothlike flight with silent wing beats.
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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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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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Lazuli Bunting: Small finch, bright blue upperparts, cinnamon-brown breast and sides, white belly. Dark wings with white wing bar. Forages on ground, low in trees and bushes. Eats seeds, insects, caterpillars. Short flights, alternates rapid wing beats with brief periods of wings pulled to sides.
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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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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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