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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.
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Orange-crowned Warbler: Small warbler with olive-green upperparts and faintly streaked, yellow underparts. The head has inconspicuous orange crown, broken eye-ring, and dark 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.
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