Night events are scheduled in national parks and wildlife refuges through December . The National Park Service is also planning to host a series of “Day Without A Park” events, including one on the Mall this weekend that will include an outdoor concert by country music star Toby Keith. Scorpions glow under ultraviolet light because of proteins in their exoskeletons . Colonies of bats exit the Carlsbad Caverns caves together every evening to hunt .
Night events are scheduled in national parks and wildlife refuges through December . Alligator River National Wildlife Refuge is home to endangered red wolves . Scorpions glow under ultraviolet light because of proteins in their exoskeletons . Colonies of bats exit the Carlsbad Caverns caves together every evening to hunt .