house martin
noun
1- a black-and-white Eurasian songbird of the swallow family, often building its mud nest on the walls of buildings毛脚燕。
1.1
- Genus Delichon, family Hirundinidae: three species, in particular the widespread D. urbica.毛脚燕属, 燕科：3种, 尤指分布广泛的毛脚燕。