Eurasian Kestrel (Falco tinnunculus interstinctus)

Often called "Common Kestrel," this is a female. Males are similar but redder above and a have a bluish crown and tail. As in most birds of prey, the male averages smaller than the female. This is sometimes called "reverse sexual size dimorphism," a phrase that strikes me as inherently biased in its assumption that males should be larger. The population breeding in Japan is said to average more heavily marked than those in Europe, but subspecies differences are slight.