7:30pm-9:30pm Join the Chewonki Foundation and the Batmobile to learn about “nature’s own bug zappers”! Meet their live, unreleasable Big Brown Bat. Take a short bat tour. Bats eat nearly their weight in mosquitoes before flying back to their roosts each night. But more than half the 44 U.S. species are endangered or in serious decline. Regular admission fees. (Call office 657-4977 if raining) The Nature Store & Snack Shack will be open for snacks & souvenirs!