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American Goldfinch: Male is a small, noisy finch with a bright yellow body, black cap, wings, and tail, and white rump and undertail coverts. Wings have flashy white patches and bright yellow shoulder bar. Bill is pink and conical. Female is duller with olive back and lacks black cap and yellow shoulder bars. Winter male has olive-gray to olive-brown upperparts, paler underparts, yellow shoulder bar, white wing bar, dark bill, and may show black on forehead and yellow on throat and face. Winter female is duller with buff wing and shoulder bars, and lacks yellow and black on face and head. Juvenile resembles winter female but has yellow wash on throat and breast.
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Antillean Nighthawk: Large nightjar, buff to pale cinnamon-brown overall with fine, dark bars and conspicuous white throat. White patches on long, pointed wings visible in flight. Tail is long, slightly notched with white subterminal tail band. Bill is tiny, bordered with bristles. Mothlike flight, frequent changes of direction.
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American Tree Sparrow: Medium, gray-brown sparrow, black and rufous-brown streaks on back, wings. Crown, eyestripes, flanks are rufous-brown, contrasting with gray face. Pale gray breast with dark central spot, rufous-brown sides. Upper mandible is dark gray, lower mandible is yellow.
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Asian Brown Flycatcher: Small gray-brown flycatcher with white underparts, gray-brown wash on sides, breast. Long gray-brown wings have faint, pale wing bar. Black bill with creamy pink base to lower mandible. Gray face has a white buff eye-ring, lores. Dark gray tail has white undertail coverts.
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Abert's Towhee: Large, stocky, shy sparrow. Distinct black face, pale gray bill, gray-brown upperparts, paler gray-brown underparts, and rust-brown vent. Tail is long and darker than upperparts with rust-brown undertail coverts. Short flights, alternates rapid wing beats with wings pulled to sides. May be difficult to spot because it prefers to stay well-hidden under bushes.
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Apapane: This is a small songbird with dark red plumage overall, a white vent and underbelly, and black wings and tail. The black bill is medium in length and decurved. It has an undulating flight, alternating several rapid wing beats with wings pulled to the sides. Apapane are primarily nectarivorous but occasionally take insects and spiders. Both sexes look similar.
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Akekee: This is a small, mostly olive songbird with yellow on the crown, cheeks, throat and underparts. It has a black mask around the eye and a bluish bill with a slightly decurved culmen. The bill works like scissors to cut open buds in search of insects to eat. It also feeds on the nectar of some trees. The sexes are similar, but the males are slightly brighter. It has an undulating flight.
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Anianiau: This is a very small songbird with yellow or green-yellow plumage and yellow edging on the feathers, wings and tail. They have beige legs and feet and a beige, slightly decurved bill. As well as eating arthropods, these honeycreepers drink nectar from flowers. Males are brighter in color than females. They have an undulating flight.
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Akiapolaau: This small songbird has an olive back and rump, yellow head with black lores, and yellow underparts with a white underbelly and vent. It has a slender, decurved upper mandible. Females are smaller and paler than males. It drills deep holes in ohia trees to drink the sap within. It also uses its unique bill to pick out arthropods from beneath the bark. It has an undulating flight.
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