Anyway...our first caterpillar started making his cocoon. Thought you might like to see the process. You can see these pictures much better and larger if you click on them.
Something interesting that I noticed is that if another caterpillar bumped him while he was working, he would wiggle and flail. I think this is a defense mechanism to keep safe
FYI, the way it works is: Caterpillars have an exoskeleton that they shed regularly. When it's time to make the cocoon, the caterpillar starts shedding his exoskeleton. The new skin that grows back is his cocoon.
This photo is from wed morning. He hung upside down all night, and then started working. That little bubble at the bottom is the beginnings of his work. .
This is from Wed. afternoon. The bottom half of the chrysalis has formed. But he's still working on the top half. You can see that is back is still caterpillar.