kestrel
/ˈkestrəl/noun
1- a small falcon that hovers with rapidly beating wings while searching for prey on the ground红隼, 茶隼。
1.1
- Genus Falco, family Falconidae: several species, in particular the common kestrel (F. tinnunculus) of Eurasia and Africa, and the American kestrel (F. sparverius).隼属, 隼科：数种, 尤指欧亚大陆和非洲的红隼（拉丁名F. tinnunculus）和美洲隼（拉丁名F. sparverius）。
词源
late Middle English castrel, perhaps from casserelle, dialect variant of Old French crecerelle, perhaps imitative of its call.