There is a fascinating article by Michael Cook on his Worm Spit blog about these silk moths. He raised some and has wonderful photos of them at every stage from a caterpillar to a beautiful moth.
You can read his article here: Worm Spit: Wild Saturniid Silk Moth - Cecropia
I rescued it from the chickens run but I soon realized that something was wrong with it. I thought one of the chickens had pecked it or stepped on it but upon closer inspection I noticed a bunch of tiny eggs or larva and some blackened necrotic tissue. After doing a little research online I found out that the tiny white eggs were from a parasitic fly called the Tachinid Fly. See photos below: