Definition of pileolated warbler
: a northwestern warbler that is a variety (Wilsonia pusilla pileolata) of Wilson's warbler distinguished by a brighter olive green on the upper parts and a deeper yellow beneath
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Origin and Etymology of pileolated warbler
pileolated capped, from Latin pilleolus, pileolus small cap (diminutive of pilleus, pileus felt cap) + English -ate + -ed — more at pile (hair)
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