Prairie Falcon (Falco mexicanus) 16" long, WS 40"

This rather large bird of prey resembles the Peregrine Falcon but is lighter in color. Typically found in fairly dry, open country--grasslands and desert. It often perches on rocks, fence posts or utility poles when it scans for prey; it feeds mainly on small birds and mammals and tends to focus on abundant and easily caught prey species. It also eats large insects.

Recommended reading:

Alderfer, Jonathan (ed.). National Geographic Field Guide to Birds: Arizona/New Mexico . Washington, D.C.: National Geographic, 2006. This handy, really pocket-size (4x6) guide includes most of the birds you're likely to see in Arizona. In addition to a photo, it includes information about behavior, habitat and specific local sites where you are likely to find the bird.