Adult Peregrine Falcon (Falco peregrinus) perched on the outer coast of Bodega Head on 25 October 2012. (Adults are slate gray, juveniles are brown.)
Although they eat a wide variety of prey, Peregrine Falcons used to be called Duck Hawks. Can you find the duck wing in the photo below?
From the emerald green in the wing, it appears this falcon was feeding on a Green-winged Teal.
After it was done feeding, the Peregrine spent some time preening.
Whenever a raven flew over, she watched carefully. (The large size indicates a possible female.)
She stretched her wings and spread her tail before take-off. I think this is the best view I've ever had of a Peregrine Falcon's tail!