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Grasshopper Sparrow: Medium sparrow with brown-streaked upperparts and white underparts. Face, flanks, and breast are plain buff-brown. Head is flat with central white stripe though dark crown. Upper mandible is gray, while lower mandible is yellow. Pink legs and feet. Named for its insectlike song.
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Gadwall: Large dabbling duck with finely barred gray body, black rump and undertail coverts, white belly, and rust-brown shoulders. Head and neck are gray-brown; bill is gray. Wings have black-bordered white speculum most visible in flight. Legs and feet are yellow. Fast direct flight.
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Gray Catbird: Small, shy, dark gray mockingbird with black cap and red-brown undertail coverts. The bill, legs, and feet are black. Forages on ground, shrubs and branches. Feeds mostly on insects and their larvae, spiders, berries and fruits. Swift direct flight on rapid wing beats.
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Great-tailed Grackle: Large blackbird, iridescent black body and purple sheen. Yellow eyes. Long, keeled tail. Walks on ground, wades in water to forage. Eats snails, insects, frogs, shrimp, small fish and birds, eggs and young of other birds, fruits, berries, seeds and grains. Strong direct flight.
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Gray Flycatcher: Small flycatcher with gray or olive-gray upperparts and pale gray underparts. Eye-ring is white. Upper mandible is dark gray, while lower mandible is pale pink with black tip. Wings are dark with two white bars. The tail is long, dark, and has white edges. Legs and feet are black.
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Green-winged Teal: Small dabbling duck with pale, gray-barred sides and buff breast with a white bar down the side. Head is chestnut-brown with green ear patch. Bill is dark gray and legs and feet are olive-gray to gray-brown. Speculum is flashy green bordered with brown above and white below.
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Greater Pewee: Large, plump flycatcher, olive-gray upperparts, white throat, gray breast, pale yellow belly. Slender crest. Broad, flat bill is two-toned: upper mandible is dark, lower is orange. Wings and tail are dark. Short flights on rapid shallow wing beats. Sallies out to take insects in air.
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Gray-crowned Rosy-Finch: Medium finch with brown body and pink on shoulders, flanks, and belly. Forehead is dark brown. The black bill turns yellow with a dark tip in the winter. Back of head and belly have gray patches. Forages in bushes, trees and on ground for seeds and insects. Bounding flight.
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Gray Vireo: Medium-sized vireo with gray upperparts, faint white spectacles, dark iris, and dull white underparts. The wings are dark gray with indistinct white bars. The sideways twitching of the tail is unique among vireos and is similar to gnatcatchers. Forages in low undergrowth.
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Golden-crowned Kinglet: Very small, warbler-like bird, olive-green to gray upperparts and pale breast. Head has bright orange crown patch bordered with yellow and black, white eyebrows and black bill. Tail is short and wings have two bars. Weak fluttering flight on shallow wing beats.
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Great Kiskadee: Large flycatcher with brown upperparts, white head with black cap and eye-line, and bright yellow underparts. Yellow crown patch is usually concealed. Wings and tail are chestnut-brown. Black bill, legs and feet. Slow fluttering direct flight with shallow wing beats.
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Gunnison Sage-Grouse: Recognized as a species in 2000. Large grouse, mottled gray-brown overall with white breast, black face, chin, throat, bib and belly. Black bill. Yellow eye combs and long black filoplumes on neck show when courting. Brown tail feathers are long and pointed, with white bands.
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Groove-billed Ani: Medium-sized black bird with iridescent blue and green overtones, with a very long tail (half the length of the bird). Bill is huge, with arched ridge and narrow grooves. Feeds on insects, ticks, spiders, lizards, fruits, berries and seeds. Flies low to the ground.
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Gambel's Quail: Medium quail, gray upperparts and breast, scaled gray nape, black patch on center of abdomen, black head plume, white-bordered black face, cinnamon-brown crown, buff underparts, flanks streaked dark chestnut-brown and white. Alternates several stiff wing beats with short glides.
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Green-tailed Towhee: Large sparrow, olive-green upperparts and pale gray underparts. Crown is rufous, throat is white with black stripes, and bill is gray. Wings and tail are edged with olive-yellow. Rapid bouncy flight, alternates several quick wing beats with wings pulled to sides.
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Grace's Warbler: Medium flycatching warbler with gray upperparts and black streaks on back and crown. Underparts are white with dark streaks on sides and yellow on throat and breast. Yellow eyebrows turn white behind eyes. Wings are dark with two white bars. Tail is dark with white outer feathers.
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Gray Jay: Medium-sized, fluffy, crestless jay with gray upperparts, paler underparts, and a short bill. Tail is long and white-tipped. Feeds on insects, carrion, refuse, seed, nuts, berries, mice, eggs and young of other birds. Light and bouyant flight on steady wing beats. Glides between perches.
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Golden Eagle: Large raptor with dark brown body and golden-brown feathers on back of head and nape. Eyes and bill are dark. Cere is yellow. Legs are completely feathered. Feet are yellow. Alternates deep slow wing beats with glides, soars on thermals. Has been clocked in a steep glide at 120 mph.
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Green Heron: Small heron with gray-green upperparts. Head, neck, upper breast are chestnut-brown, belly is paler brown. Head has green-black cap with small crest. Throat is white and neck has white central stripe. Bill is two-toned with dark upper mandible and yellow lower mandible. Direct flight.
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Great Blue Heron: Large, elegant heron with blue-gray back, black sides, and gray-and-white striped belly. Long neck is gray with black-bordered white throat stripe. Head has white face, cap, and black crest. Upper mandible is dark, while lower mandible is yellow. Direct flight on steady wing beats.
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Great Egret: Large, white heron with yellow eyes. Bill is yellow, may appear orange when breeding. Black legs and feet. Long feather plumes extend from the back to beyond the tail during breeding season. Feeds on fish, frogs, insects, snakes and crayfish. Bouyant direct flight on steady wing beats.
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Great Horned Owl: Large owl with dark brown, gray-brown mottled upperparts and dark barred underparts. Head has distinct ear tufts and rufous facial disk. Throat and upper breast are white and may have dark spots. Northern birds are paler and grayer. Strong, silent, direct, flap and glide flight.
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Greater Yellowlegs: Large sandpiper with mottled brown, gray, and white upperparts. Underparts are white with dark streaks, spots. Bill is slightly upturned. Legs are long and bright yellow. Long barred tail and white rump are conspicuous in flight. Swift direct flight, sometimes at great heights.
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Greater White-fronted Goose: Medium goose with dark-brown body. Underparts are barred and flecked with black; belly and undertail coverts are conspicuously white. Front of face has a white patch. Bill is usually pink. Legs are orange. Steady direct flight with rapid wing beats. Flies in V formation.
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Greater Roadrunner: Large, ground-dwelling cuckoo with overall brown, white and buff streaked appearance. Head has a shaggy crest. Face has blue and orange bare patch of skin behind eyes. Tail is long. Eats insects, lizards, snakes, rodents, small birds and fruits and seeds. Can run up to 15 mph.
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