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The head of a Chestnut-Sided Warbler.

Warbler

The head of a Chestnut-Sided Warbler.

"Chestnut-sided Warbler, Dendroica pensylvanica. Back streaked with black and pale yellow (sometimes ashy or whitish); whole crown pure yellow, immediately bordered with white, then enclosed with black; sides of head and neck and whole under parts pure white, former with an irregular black crescent before the eye, one horn extending backward over the eye to border the yellow crown and be dissipated on the sides of the nape, the other reaching downward and backward to connect with a chain of pure chestnut streaks that run the whole length of the body, the under eyelid and auriculars being left white; wing-bands generally fused into one large patch, and, like the edging of the inner secondaries, much tinged with yellow; tail-spots white, as usual; bill blackish, feet brownish." Elliot Coues, 1884

Chestnut-sided Warbler

"Chestnut-sided Warbler, Dendroica pensylvanica. Back streaked with black and pale yellow (sometimes…