Looking at leaves makes it easy to identify trees, but what about when the leaves have fallen and are covered with snow? We’ll identify trees by bark and twig on this winter woodland walk. Natural Discoveries is an award-based series of free nature programs designed for ages seven to adult. Themed hikes are held on Sundays, and hikes that explore seasonal happenings are offered on Wednesdays. No registration is required. Please visit the park district's website for a brochure listing complete hike details and dates. Free.