Check out this time-lapsed video of a caterpillar spinning its chrysalis! It is a tad shaky, but fascinating. The part that drops off at the end is its skin. Thanks to Linda Stolz for sharing her daughter's video.
Recommended Reads:
Peter Hatch, "A Rich Spot of Earth: Thomas Jefferson's Revolutionary Gardens at Monticello" Andrea Wulf, "Founding Gardeners: The Revolutionary Generation, Nature and the Shaping of the American Nation" and "The Brother Gardeners: Botany, Empire and the Birth of an Obsession"