This colorful moth is a buck moth, Hemileuca maia. They are a member of the Saturniidae family. They are fond in the eastern half of the United States with eastern Minnesota being the north west portion of their range. This is probably a male because females usually have more red on the tip of their abdomen.
Buck moths are usually seen flying on sunny days in early Autumn. I found this one wandering in the grass in the Minnesota Valley NWR on a sunny September day. Typically there is one generation of buck moth a year but here in the north many will actually pupate through a second winter. I love the eye in this last shot, it gives him an almost whimsical look.