sand martin
noun
1- a gregarious swallow-like bird with dark brown and white plumage, excavating nest holes in sandy banks and cliffs near water崖沙燕。
1.1
- Genus Riparia, family Hirundinidae: three species, in particular the widespread R. riparia (North American name: bank swallow).沙燕属, 燕科:3种, 尤指分布广的崖沙燕(拉丁名R. riparia, 北美名: BANK SWALLOW)