Falco vespertinus

The red-footed falcon, formerly the western red-footed falcon, is a small falcon 28–34cm long with a wingspan of 65–75cm and an average mass of 155g. The adult male is all blue-grey except for a red undertail and legs, with uniformly grey underwings. Young birds are brown above and buff below with dark streaks and a face pattern like the female's (Wikipedia, general species account).

It is found in eastern Europe and Asia, although numbers are reported to be dwindling due to habitat loss and hunting. It is migratory, wintering in Africa, and lays two to four eggs. Its maximum lifespan is 13.25 years in the wild and 18 in captivity. It is a regular wanderer to western Europe, and one was found in North America for the first time in August 2004 (Wikipedia, general species account).