YIKES...
anne nixon-ellery
The Saddleback Caterpillar is a unique looking slug caterpillar & is mostly green with brown at each end with a white-ringed purple-brown dot in the center which looks like a saddle. When fully grown, it measures approximately one inch long and 3/8 inch wide. It has a pair of fleshy horns at each end which contain hairs that secrete irritating venom along with protruding spines in every direction. Its stings are painful and can cause swelling, nausea and a rash which lasts for days. The Saddleback Caterpillar can be found in gardens, flower pots, fields and forests. It eats everything from garden plants to trees and shrubs.
This is what it grows into:
