Use observation and critical-thinking skills to investigate patterns of tracks, feeding scenes and other signs made by often-unseen creatures. Extend your day by signing up for the morning program and packing a picnic lunch. Registration required by Thursday, April 2: 708-946-2216. https://anc.apm.activecommunities.com/fpdwc/activity/search/detail/9970?onlineSiteId=0&from_original_cui=true