Old Trail School students were surprised when a rare Hickory Horned Devil Caterpillar dropped from a tree while students were outside during science class. The Hickory Horned Devil stumped the School’s science teachers who had never seen this rare caterpillar. These caterpillars live in the deciduous forest areas of the eastern U.S. and are more common in the south. The caterpillars (Citheronia regalis) transform into the largest moths found north of Mexico and have gray-green and orange wings. They grow to about four to six inches wide and only live about a week.