To learn about the monarch butterfly, come to a presentation by a naturalist and a master gardener at the Cradle of Forestry. The multimedia program is meant to offer a glimpse into the life cycle and migration pattern of the butterfly. It also is to include lessons on raising it in classrooms and growing its only food source, milkweeds, which is disappearing from North American fields. The main presenter, Ina Warren, is a conservation specialist with Monarch Watch, an outreach program at the University of Kansas. She has studied the butterfly in its wintering grounds, in central Mexico, and has helped more than a dozen groups establish habitats for it. Sept. 21, Cradle of Forestry, near Brevard, N.C. 828.877.3130.