Clarksville, TN – Tennessee wildlife officials have closed public access to most state park caves for at least one year. They are worried about an endangered gray bat species dying out from a fungus that has killed almost a half-million bats from New York to Virginia in the last three years. Montgomery County's Dunbar Cave is staying open, even though it's one of two in Tennessee that are home to gray bats. The fungus causes white-nose syndrome in bats and affects varying species. No evidence of the syndrome in Tennessee caves have yet to be found.