Strong winds can pick up these threads and transport caterpillars over many miles. Caterpillars feed approximately two months and then pupate. Two weeks later, brown males moths and white female moths emerge. Females seldom fly and are dependent on males locating them. Egg masses usually contain 1,000 eggs and are covered with buff colored hairs from the female's stomach.
Moths live less than two weeks.
There is only one generation per year. Gypsy Moths are often confused with the Eastern Tent Caterpillar which emerges at the same time and can appear similar. However, Gypsy Moths DO NOT spin webs or tens. Copyright 1995 by the Board of Trustees of the University of Illinois. The information provided is for educational purposes only.