willow warbler
noun
1- a small migratory Eurasian leaf warbler with mainly drab plumage and a tuneful song欧柳莺。
1.1
- Genus Phylloscopus, family Sylviidae: several species, in particular the common and widespread P. trochilus.柳莺属, 莺科：数种, 尤指常见且分布广泛的欧柳莺。