ruby-crowned kinglet

[ roo-bee-kround ]
/ ˈru biˌkraʊnd /

noun

an olive-gray, American kinglet, Regulus calendula, the male of which has an erectile, ruby crest.

Origin of ruby-crowned kinglet

An Americanism dating back to 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019