Forest Tent Caterpillar (IMAGE) University of Wisconsin-Madison Caption A forest tent caterpillar rests on an aspen leaf. These caterpillars are found in hardwood forests throughout the United States, where they feed on the leaves of trees like aspen and birch. Credit Photo courtesy of John Couture, UW-Madison Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.