I found some of these fat caterpillers in my garden. It looks like they eat my plants. There are quite a lot of them and they actually overwintered under leaves. They are quite fat, 1.5 inches long. Green inside! Sorry, I killed them! Please help me to id it. I couldn't find anything similar in my books. How would I get rid of something like that? I have a suspicion it ate some of the crocuses and dafodills. Thanks!