A Monarch butterfly tagging event is set for Saturday (Oct. 13) at Acton Nature Center, 6900 Smoky Hill Court, in Acton. The tagging will be done from 9:30-11:30 a.m., and 12:30-3 p.m., according to organizer Dayna Inbody. There will be an educational session on the life cycle of the Monarch, and tagging instruction. That will be followed by field time to put the information into practice. For more information, call the nature center at 817-326-6005.