Cecropia caterpillar

My husband noticed this cecropia caterpillar on the rugosa rose this morning. It's a bit tangled up in a cobweb but it is so big - about 4" long - that I doubt the web will be of any concern. We see one of these caterpillars or the adult moth only about once every 10 years so it is always special treat to see one. I just love the different coloured spots. The caterpillar makes me think of something a child would create out of playdough or perhaps a colourful baby toy.
It will hibernate in a brown cocoon over the winter and hopefully hatch out next spring as a beautiful big brown moth with striking eye-spots on its wings. It will only live about two weeks.