Beautiful pic of beautiful leaf (and caterpillar).Beware though, I used to keep these ones in a tank when I was little (I know, bit peculiar, I wanted to see them pupate) and they give you a rash if you handle them
Nothing odd about that, apart from perhaps your choice of species. I used to do the same with cabbage that didn't cause rashes.
love caterpillars! this guy is cool!