Eggs are shiny and oblong shaped. Larvae hatch in the spring and nibble at the foliage of low-growing plants. Caterpillars are black with blots of rusty-orange on the body where tufts of bristles grow. They are mostly active at night, when their natural coloring offers camouflage. Adults do not eat. They emerge in the summer and are active all season long as well as into the fall.