39-50 cm (16-19") Uncommon. Western prairies, open country.
Large falcon - crow size; light brown above; dark thin sideburns; white throat; spots or streaks on creamy white breast and belly; long, pointed wings; long, banded tail.
Immature: brown above; heavily streaked below.
In flight; all birds show distinctive black wingpits against the light underside.
Catches birds on the wing or on the ground.
Song: harsh series of "ki-ki-ki-ki" notes.