This bird was a long time coming for me. It was photographed at a sod farm between Phoenix and Tucson, AZ.
Some words from the Cornell website: "A raptor of the West’s wide-open spaces, Prairie Falcons glide above shrubby deserts and grasslands searching for ground squirrels and other small mammals and birds. In flight, look for the dark triangle of “armpit” feathers that distinguish it from other light-colored falcons. On the breeding territory you may hear a Prairie Falcon pair’s loud courtship calls, but roosting birds can be tough to spot: their muted cream, brown, and gray plumage blends perfectly with the steep bluffs and cliffs where they nest."