Saturday, December 18. 1-3 p.m. Thorn Creek Nature Center. Free.  All ages. Registration required by Tuesday, December 14: 708.747.6320.

Tracks can be clues to wild animals’ identities and behaviors. Discover how animals survive through the different seasons. We will walk the trails searching for tracks and other animal clues. Bring home your own track replica. Program is sponsored by Thorn Creek Audubon Society. Participants should be prepared to walk more than one mile outdoors on natural surface trails across uneven terrain.