名詞 wheatear:

1. small songbird of northern America and Eurasia having a distinctive white rump

wheat.ear

n.（名詞）
A small thrush(Oenanthe oenanthe) having a gray back, buff breast, and white rump, found in open areas of most northern regions.
穗：一種小歌鳥（穗） 有灰色的背，胸部呈暗黃色，腰部白色，在大多數(shù)北部地區(qū)空曠開闊地帶可以找到

來源：
Back-formation from earlier wheatears [taken as pl.]
源自 較早期 wheatears的逆構詞 [被當作復數(shù)形式]
probably by folk etymology from white
可能源自 white的民間詞源
arse
arse