KENNEDY SPACE CENTER, FLA. -- White herons, blue herons, ibis and several other species of birds gather on a pond near Kennedy Space Center to hunt for food. KSC shares a boundary with the Merritt Island National Wildlife Refuge, which surrounds it. The refuge is a habitat for more than 310 species of birds, 25 mammals, 117 fishes and 65 amphibians and reptiles. In addition, the refuge supports 19 endangered or threatened wildlife species on Federal or State lists, more than any other single refuge in the U.S. Photo credit: NASA/Ken Thornsley KSC-07pd0731