Observation notes: We were digging up some rotted wood 2X4's along the driveway. Shortly after, we noticed this caterpillar on the driveway. We are located on a lake in Central Minnesota in a heavily wooded area. As we are here only for a few days every few weeks, we grow no fruits or vegetables or any other "host" plants. We are surrounded by woods and water. The weather was sunny and in the upper 70's. It appeared to be about 3" long.