A large eight-point white-tailed buck, in a dignified walk, crosses a winding trail. A white-tailed doe stands in front of a mist-strewn river. White, wing-shaped blossoms of Dutchman's breeches grace the trail's edge. Great horned owls hoot in the morning twilight. A coyote sings in dawn's early light. There is more to a mid-western forest preserve than a place to walk your dog or have a family picnic McDowell Grove Forest Preserve, in Dupage County,...