kestrel

Acuteness of sight is difficult to define but if we were endowed with the eyesight of a kestrel it is estimated that we could read a newspaper at a range of 25 yards.

食肉鸟视力的敏锐度是很维定义的，但是我们可以这样给鹰的视力加以说明，如果我们具有鹰的视力，那么我们可以在25码的距离之外可以看报纸。