Photographs: © Michael & Patricia Fogden/CORBIS (vampire bat), Roy Toft/National Geographic Image Collection (tent-making bats), Dr. Merlin D. Tuttle/Bat Conservation International (white fruit bats), Claus Meyer/Minden Pictures (fruit bat), Alonso Carlos Sanchez/OSF/Jupiter Images (horseshoe bat), Dr. Merlin D. Tuttle/Bat Conservation International/Photo Researchers, Inc. (Gambian bats), © Theo Allofs/CORBIS (flying-fox bat), Art Wolfe/Getty Images (fruit bat), Gerard Lacz/Peter Arnold, Inc. (mouse eared bats)