Animals species found in the National Monument include birds such as the pinyon jay, canyon wren, and turkeys (which were reintroduced by the State of Utah to the table-lands above the Monument) and mammals like rabbits, pack rats, bobcats, coyotes, bears, mule deer, and mountain lion. The Monument's pygmy rattlesnakes have been the subject of occasional study; several species of lizard common to southern Utah are abundant. In May 2006, KSL Newsradio reported a case of plague found in dead field mice and chipmunks at Natural Bridges.