The cold temperatures and scarcity of food in winter can be challenging for plants and animals. Find out different strategies in nature for surviving the winter. Discover who stays active and who hibernates. Natural Discoveries is an award-based series of free nature programs. Themed hikes are held on Sundays, and hikes that explore seasonal happenings are offered on Wednesdays. Please visit the park district's website for a brochure listing complete hike details and dates. No registration is required. Ages 7 and up. Free.