This page is for the Cliff Swallow (Petrochelidon pyrrhonota). My first photographic evidence occurred on May 5, 2012 at Caprock Canyon State Park, Quitaque, TX. My wife were driving home from a hiking trip at Palo Duro Canyon State Park and we stopped here to see the American Bison (Bison bison) herd that roams the park. We had the added treat of seeing the Cliff Swallow shown here.