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Great Gray Owl: Large owl, dark gray body interspersed with bars and flecks of brown, pale gray, and white. Head is large and without ear tufts. Yellow eyes are relatively small. Bulky appearance when perching due to dense, fluffy plumage, long wings extending past body, and relatively long tail.
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Gyrfalcon: Large northern falcon with three color morphs: dark, white, and gray. Dark morph is dark gray with pale streaks on throat and upper breast. White morph is white with dark spots and markings on wings, nape, and sides. Gray morph is a mix. The eyes, bill, and legs of all morphs are yellow.
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Golden-crowned Sparrow: Large sparrow, brown-streaked upperparts and plain gray breast. Yellow crown is bordered by a wide black cap; cheek and collar are black. Bill is gray. Wings are brown with two white bars. Short flights, alternates rapid wing beats with brief periods of wings pulled to sides.
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Glaucous Gull: This large white gull has a pale gray back and yellow eyes. The bill is yellow with a red spot on the lower mandible. The wings are white-edged and white tipped; the legs and feet are pink. It is an active predator of seabird nesting colonies. Diet includes fish, insects and birds. It has slow steady wing beats and soars on thermals and updrafts. The sexes are similar.
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Glaucous-winged Gull: This large gull has gray upperparts with white underparts, head and neck. The eyes are dark and the bill is yellow with a red spot on the lower mandible. The wings are gray with white edges and spots near the tips. The legs and feet are pink. It feeds on fish, small birds, or almost anything. It has a powerful direct flight and often soars on thermals. The sexes are similar.
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Gila Woodpecker: Medium woodpecker, black-and-white barred upperparts and central tail feathers, buff-gray neck and underparts. Buff-gray head has a small red cap. Wings have large white patches visible in flight. Its abandoned nesting and roost holes provide shelter for birds, mammals and reptiles.
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Golden-winged Warbler: Small warbler with gray upperparts and white underparts. Face is white with black mask and throat, and head has a yellow crown. Wings are gray with large yellow patches. Its flight is weak and fluttering, alternates rapid wing beats with periods of wings drawn to its sides.
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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-cheeked Thrush: Small thrush (minimus), with olive-brown upperparts, buff-brown breast with brown spots, and white or buff belly. Gray eye-ring is indistinct. Upper mandible is black with pale base, while lower mandible is yellow with black tip. Tail and rump have rust-brown wash.
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Gilded Flicker: Large woodpecker with dark barred and spotted brown back, brown cap, pale gray face and throat, red moustache stripe, white rump, thick black crescent on upper breast, and black spotted, pale buff underparts. It was named for the gold color of its underwings and tail.
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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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Greater Scaup: This large diving duck has a glossy green-black head, white sides and belly, black tail, neck and breast, barred gray flanks and back. The eyes are yellow and the bill is blue-gray with a black tip. The diet includes aquatic insects and plants. It has a rapid direct flight with strong, quick wing beats. The female is dull brown with a white patch on the face at base of bill.
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