Small falcon Falco columbarius of Eurasia and North America, where it is also called pigeon hawk. The male, 26 cm/10 in long, has a gray-blue back and reddish brown barred front; the female, 32 cm/13 in long, is brown with streaks.
A small compact falcon (Falco columbarius) of the northern hemisphere having a broad dark terminal band on the tail and upperparts that are slate blue in males and brown in females