Huge green insect

Homage to Kris Ericson. Last month, I made a post about my friends new blog where he was posting a new picture each day. One of his first pictures was this really awesome insect, Luna Moth Catipillar, you can see it here. Last week, during my stay in Jamestown, North Dakota I found this huge crawler (unsure of its name) and had to take close ups pictures like Kris. Make sure to check out his one picture a day blog.