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Dusky Warbler: Small, dark warbler with gray-brown upperparts, gray-streaked underparts, distinct white eyebrow, and faint eye-ring. The tail is slightly round-tipped. Brown legs and feet. Forages on ground, in trees. Constantly flicks wings. Weak fluttering direct flight with shallow wing beats.
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Arctic Warbler: Medium-sized, active warbler with stout bill, olive-green back, olive-brown sides, and white throat and belly. Dark eye-lines contrast with pale yellow eyebrows curving upward behind eyes. Wings have faint pale bar on tips of greater coverts. Tail is square. Pale yellow legs, feet.
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