I came into my office a couple weeks ago, after my weekend, to find the little hickory horn devil deceased. :(
I'm not sure what caused its demise. It had food, and it had been eating. I'd also provided water, just in case. Maybe it was lack of sunshine - my office is very dark.
On the other hand, my coworker is the caterpillar queen, and she has a house full of cecropia, polyphemus, imperial and monarch caterepillars.
Yes - monarchs! At last we are starting to find some. We now have TWO at work (whereas by now we normally have had 50+ go thru our monarch monitoring containers.
Plant more milkweed!!!