The listing of the Bethany Beach firefly would be the first of its kind. The U.S. Fish and Wildlife Service has proposed listing the first firefly ever on the federal Endangered Species Act. The nocturnal Bethany Beach firefly (Photuris bethaniensis) is found only in the Delmarva Peninsula of Virginia, Delaware and Maryland in a handful of freshwater marsh areas that lie within 500 meters from the ocean. Rising sea levels due to climate change and storm surges are the main threats to this species. Development, light pollution and other problems might also affect the insect. A public comment about the proposal will last 60 days from the announcement on Oct. 1.