While adults are generally found alone, the larval form (caterpillar) can be seen grouping together on a single tree. The green caterpillar has long white stripes running head-to-tail. Red patches are near the rear while short spikes stud the entire length of the body. Two larger black spikes are at the head. The caterpillar's diet consists of the leaves of maple trees and other hardwoods. A large number of them on a young maple tree can inflict damage to the sapling, rendering them a pest. They weave silk cocoons and are members of the Silkmoth family. When ready to breed, females are believed to release a pheromone into the air that males up to half a mile away can detect.