The common kestrel hunts vertebrate animals in a small, familiar hunting ground, whereas the very similar lesser kestrel feeds on insects over a large area.

• 普通红隼在一个它们熟悉的小型猎场猎食脊椎动物，可与之非常相像的较小的红隼却在很广的区域上捕捉品虫为食。