Marin is home to 13 of California’s 23 known bat species, and the county’s conservation agencies are eager to find out more about both their numbers and habits. Last week, the Board of Supervisors approved $6,800 in funding for a multi-year bat inventory and monitoring project, the first of its kind in the county. It’s a collaboration between agencies that participate in the One Tam campaign, including the National Park Service, Marin County Parks, California…