what birds have olive heads
Willow Flycatcher: Small flycatcher, brown-olive upperparts, white throat contrasting with paler breast, white to pale yellow belly and faint white eye ring. Dark wings with two white bars. Feeds on insects, spiders, berries. Weak fluttering flight with shallow rapid wing beats.
Red-eyed Vireo: Medium vireo with olive-brown upperparts and white underparts. Head has a gray cap, white eyebrow, black eyestripe, and red eyes. Blue-gray legs and feet. Alternates short glides with series of rapid wingbeats. May hover briefly to pick berries or insects from foliage.
White-eyed Vireo: Medium-sized, secretive vireo with olive-green upperparts, and white underparts with yellow sides and flanks. Spectacles are pale yellow and iris is white. Wings are dark with two white bars. Legs and feet are gray. Flight is fast and direct on short, rounded wings.
Blue-headed Vireo: Medium-sized vireo with olive-green upperparts, white underparts, and yellow flanks. Head has blue-gray hood, white spectacles, and white throat. The wings are dark with two white or pale yellow bars. Weak, fluttering flight with rapid wing beats. May hover briefly.
Philadelphia Vireo: Medium vireo with olive-green upperparts and yellow-washed to yellow underparts. The head has a gray cap, dark eyes, and white-bordered black eye-line. Wings are olive-green with very faint wing-bars. Undertail coverts yellow. First discovered near Philadelphia in 1842.
Olive-backed Pipit: Medium-sized pipit with finely streaked, olive-green upperparts. White underparts, chin, belly and undertail coverts. The sides and breast are pale brown with bold dark streaks. The eyebrow is buff-orange in front and white behind eye. The legs and feet are pink.
Swainson's Warbler: Medium-sized warbler with olive-brown upperparts and pale gray underparts. Head has brown cap, white eyebrows, and dark eye-lines. Wings are plain olive-brown. It hides in dense thickets, where it forages on the ground looking for insects, spiders, and caterpillars.
Cassin's Vireo: Small vireo, olive-gray upperparts, white underparts, pale yellow flanks. Head is gray with white eye-ring that extends to brow. Wings are dark with two white bars. Until the 1990s was classified as the Solitary Vireo, along with the Blue-headed and Plumbeous Vireos.
Black-capped Vireo: Small vireo, olive-green upperparts, black hood, white spectacles interrupted with black above the eye, white underparts with olive-yellow flanks. Wings are dark with two pale bars. Iris is red-brown to red. It has been listed as an endangered species since 1987.
Black-whiskered Vireo: Large vireo with olive-green upperparts and olive-buff washed white underparts. The head has gray crown, dark whiskers (moustache stripe) along sides of throat, white eyebrow with black border, and red-brown eyes. The bill is black, straight, and slightly hooked.
Gray-crowned Yellowthroat: Large warbler rarly seen in the U.S. Upperparts are olive-brown to olive-gray with a grayer head, distinctive black mark between bill and eyes, and broken white eye-ring. The upper mandible is black and lower mandible is pink. Underparts are yellow with gray wash on sides.
Black-faced Grassquit: Small sparrow, very dark olive-gray with black head and breast. Black bill, legs and feet. Very common in the West Indies. Feeds mainly on seeds, especially of grasses and weeds. The flight is weak, bouncy and fluttering. Alternates rapid wing beats with pulling wings to body.
Ruby-crowned Kinglet: Medium kinglet, olive-green upperparts and olive-buff underparts. Head has inconspicuous tuft of red crown feathers and white eye rings. Wings are dark with two white bars. Tail is slightly notched and has white edges. Weak fluttering flight on shallow wing beats.
Hutton's Vireo: Small vireo, olive-gray upperparts, buff to yellow underparts. Eye ring is white, broken above eye. White undertail coverts. Wings are dark with two white bars. Gray bill is short and thick. Legs, feet are blue-gray. West Coast birds have greener upperparts then southwestern birds.
Orange-crowned Warbler: Small warbler with olive-green upperparts and faintly streaked, yellow underparts. The head has inconspicuous orange crown, broken eye-ring, and faint eye-line. Though it lives and nests in dense foliage close to the ground, the male perches at the tops of tall trees to sing.
Townsend's Warbler: Olive-green upperparts, black throat and upper breast. Lower breast and sides are yellow with black streaks and belly is white.Face is yellow with black crown and cheek patch and yellow crescent below eye. Wings have two white bars. Tail has white edges, dark center and tip.
Common Yellowthroat: Small, skulking warbler with olive-yellow upperparts, bright yellow throat and breast, and pale gray belly. The head has a black mask with a thick white border above, black bill. Legs are pink. Slow weak flight, alternates periods of rapid wing beats with wings pulled to sides.
Wilson's Warbler: Small warbler with olive-green upperparts, bright yellow face and underparts, distinct black cap. It has a long, olive-brown tail which it moves up and down, or in a circular fashion, as it searches for food. It is more common in the West than in the East. Legs and feet are pink.
Cape May Warbler: Small warbler, olive-yellow upperparts, thick, black streaks on yellow underparts. Bright yellow face, chestnut-brown ear patch, black crown. Wings are dark with large white patches. First collected in Cape May, New Jersey in 1811 and not seen again in that area for over 100 years.
Kentucky Warbler: Medium, ground-dwelling warbler with bright olive-green upperparts and yellow underparts. Head has black mask and sideburns and thick yellow eyebrows. Bill is black, legs and feet are pink. Secretive, heard rather than seen. It is named for the state where it was first discovered.
Hooded Warbler: Medium warbler, olive-green upperparts, bright yellow underparts. Head has black hood, and yellow face. The eyes are large and dark and the tail is often spread, displaying large white spots. Bill is black, legs and feet are pink. Makes short, direct flights on rapidly beating wings.
Connecticut Warbler: Large ground-walking warbler, olive-gray upperparts, dull yellow underparts. Head has a slate-gray hood and bold white eye-ring. It was named for the state where it was first discovered, where it is an uncommon migrant. Sometimes called Swamp Warbler.
Black-throated Green Warbler: Medium-sized warbler with olive-green upperparts, black-streaked flanks, and white underparts. Face is yellow with black eyestripe and bill. Crown is olive green. Throat and upper breast are black. Wings are dark with two white bars. Tail is dark. Black legs and feet.
Pine Warbler: Medium warbler with plain olive-gray upperparts, yellow throat and breast, blurry-streaked sides, and white belly and undertail coverts. Wings are gray with two white bars. It is the only warbler that eats large quantities of seeds, usually pine. One of the earliest breeding warblers.
Prairie Warbler: Small warbler, brown-streaked, olive-green upperparts with reddish-brown streaking, bright yellow underparts with black streaks on sides. Head has a yellow-green cap, yellow face, and dark eye, cheek stripes. Found in pine stands, mangroves and overgrown fields rather than prairies.
Dusky Flycatcher: Small flycatcher with olive-gray upperparts and white or yellow tinged underparts. The upper breast has a pale olive wash. Eye has faint eye-ring. Bill is black except for orange base of lower mandible. The legs and feet are black. Weak fluttering flight with shallow wing beats.
MacGillivray's Warbler: Medium-sized warbler with olive-green upperparts and yellow underparts. White eye-ring is broken and slate gray hood extends to upper breast where it darkens to black. It forages for insects on or close to the ground. As it hops, it often flicks its tail from side to side.
Tennessee Warbler: Small warbler with olive-green upperparts, white underparts, and olive-gray washed sides. Darker head has white eyebrows and dark eyestripes. Wings are plain gray. Tail is short. It spends the summers in Canada and is only found in Tennessee during migration. Eats mostly insects.
Mourning Warbler: Medium-sized warbler with an olive-green back, wings, tail, and gray hood. The underparts are yellow and the upper breast is black. It's named for the way its dark breast and hood resemble a person in mourning. It is one of the latest spring migrants of all North American warblers.
Nashville Warbler: Small warbler, olive-green upperparts, yellow underparts, white lower belly. Small chestnut-brown cap, barely noticeable. Gray hood extends to back, eye-ring is white. Two breeding populations, a mid to northeastern one that doesn't wag its tail, and a Pacific Coast one that does.
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