Smithgall Woods State Park in Helen is holding a seminar on bats from 6-8 p.m. Friday at its visitors center. Participants will learn about native bats and how important they are to the ecosystem. The program is perfect for families, featuring lots of facts, props and a video. After the program, a short hike will provide an opportunity to search the sky for bat activity. Cost is $5 per family or $2 per person, plus $5 for parking. For more information, call 706-878-3087.