The first year of the Marin Bat Monitoring Project has revealed interesting data about the 13 bat species found in Marin. The project, undertaken by the United States Geological Survey and One Tam, is focused on identifying the feeding and roosting sites of local bat species. Although feeding sites can be identified using acoustic data derived from their calls, the study of roosting sites requires capturing individual bats using mist nets—which don’t harm the creatures,…