In spring or summer eggs are laid. They take between 5 days and two weeks to hatch.
	These caterpillars are about two weeks old.  Caterpillars shed their skins 4 intermediate times resulting in 5 phases, called instars.  These caterpillars are in second instar, just before shedding their skins to enter third instar.
	This caterpillar has just entered second instar.  Its head is facing down.  It may turn around and eat the skin it has shed (black, at rump of caterpillar).  The spikes on its head, called tubercles, are pastel colors.
	This caterpillar is in third instar. Tubercles are bright primary colors. It is about 8 times its original size.
	Fourth instar looks much like the third but larger.  Tubercles are now pastel colors.
	This is the fifth instar. The caterpillar (larva) is plump and is up to 5 inches long. It is ready to spin its cocoon.
	The caterpillar spins a cocoon to protect it during the winter. Inside the cocoon, the caterpillar turns into a pupa.
	In spring or early summer, the adult emerges from its cocoon and expands its wings. The adult stage is spent mating and laying eggs.  The adult does not eat and dies within 2 weeks.
	When the moth finds a suitable partner, they mate and the female goes on to lay eggs, thus completing the cycle.