pileolated warbler
noun
pi·le·o·lat·ed warbler
ˈpīlēəˌlātə̇d-
: 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
Word History
Etymology
pileolated capped, from Latin pilleolus, pileolus small cap (diminutive of pilleus, pileus felt cap) + English -ate + -ed (hair)