Angela Gray, U.S. Air Force Civil Engineer Center environmental analyst, and Tomas Olexa, 633rd Civil Engineer Squadron natural resources manager, examine a guide book to identify a bird during the Earth Week Bird Count at Langley Air Force Base, Va., April 23, 2014. The base hosts two annual bird counts, held in spring and winter. The data collected from these counts is shared with the 1st Fighter Wing Safety office and the local birding community. (U.S. Air Force photo by Master Sgt. April Wickes)