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Yellow-headed Blackbird: Medium-sized blackbird with black body, bright yellow hood and breast, and distinct white wing patches. Bill, legs and feet are black. Forages in low vegetation and on the ground. Feeds on insects, larvae, snails, seeds, and grains. Strong direct flight on rapid wing beats.
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Yellow-breasted Chat: The largest North American warbler. Has olive-green to olive-gray upperparts, brilliant yellow throat, breast. Belly and undertail are white. Eyes have white spectacles and dark eye patches. Bill is heavy and dark. Wings and tail are olive-green. Bill, legs, and feet are black.
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Yellow Warbler: Small warbler with olive-yellow upperparts and bright yellow underparts with rust-brown streaks on breast, sides. Wings are dark with two white bars. Tail is dark with yellow-tinged edges. Has a wider range than any other North American warbler. Eats insects, larvae, and some fruit.
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Yellow-billed Cuckoo: Medium cuckoo, gray-brown upperparts and white underparts. Bill is mostly yellow. Wings are gray-brown with rufous primaries. Tail is long and has white-spotted black edges. Gray legs, feet. Feeds primarily on hairy caterpillars, also insects, larvae, small fruits, and berries.
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Yellow-green Vireo: Medium vireo, olive-green upperparts, pale yellow underparts, bright yellow sides and flanks. Crown is dull gray, eyebrows are white, and eyestripe is dark. Eyes are red. Bill is gray, legs, and feet are blue-gray. Flight is fast and direct on rapidly beating wings.
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Yellow-footed Gull: Large, dark-backed, white gull with distinctive yellow legs. Bulbous bill is yellow, red spot near tip of lower mandible. Upper wings are dark gray with white spots near tips, white trailing edges. Strong, direct flight with deep, steady wing beats. Rides thermals and updrafts.
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Yellow-chevroned Parakeet: Medium parakeet, green overall with paler green underparts. The wings are green with yellow bar; underwing coverts are yellow-green. Buff bill. Pink-gray legs and feet. Feeds on seeds, fruit in native habitat, feral populations have adapted to take in blossoms and nectar.
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Yellow-headed Parrot: Large green parrot with yellow head. Flight feathers all tipped blue-black, patch of red on secondary feathers and at bend in wing. Curved yellow beak, gray legs and feet. Feeds on fruits, seeds, and buds. Classified as an Endangered Species owing to rapid population decline.
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Yellow-billed Magpie: Large jay with black hood, back and breast, featherless, pale yellow spot behind eye, and white belly. Bill is yellow. Upperwings are iridescent blue-green with large white shoulder patches. Tail is iridescent green-black, very long, and wedge-shaped. Legs and feet are black.
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Yellow-rumped Warbler: Medium warbler, dark-streaked, blue-gray upperparts, yellow rump. White throat and belly, black breast. The head is black with yellow crown, white eye-rings, and faint eyestripes. Wings are dark with yellow shoulder patches and two white bars. Tail is dark with white corners.
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