A Cooper's Hawk perches in a tree May 12, 2012, at Langley Air Force Base, Va. The Cooper's Hawk's population is “uncommon to rare,” but has steadily increased after its lowest population in the 1970's. Bird watches observed 61 different species throughout the base during the 2012 Spring Bird Count. (U.S. Air Force Photo by Senior Airman Stephanie Rubi / Released)