Saddleback caterpillars. These have stinging hairs. Photo provided by: Robert L. Anderson, USDA Forest Service, Bugwood.org

Banded tussock moth – caterpillar stage (immature). These hairs do not sting. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

White-marked tussock moth –caterpillar stage (immature). These hairs do not sting. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware