12 cm (5") Common; more so in the west than in the east. Moist woodlands, bogs, especially thickets of willows and streamside undergrowth.
A small warbler with a beady black eye. Olive above. Yellow below.Long tail is black above and below and often cocked.
Male: distinct round black cap.
Female and Immature: lacks distinct black cap. Has no white in tail like similar female Hooded warbler.
Song: chatter.
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Credit: Larry Bond
Images
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Credit: Doug Greenberg

Credit: Bill Bouton

Credit: Michael Woodruff

Credit: Jerry Oldenettel
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Credit: Rick Bond