You can't quite see the red patch on his head, but you can read more about the Hairy Woodpecker and see much better pictures that the one I have here.
The Hairy Woodpecker isn't the biggest of the woodpeckers that live in North Dakota, that honor goes to the Pileated Woodpecker (See more info and pictures here). We had a Pileated Woodpecker briefly stop and visit us last fall off and on for a few weeks. On the couple of occasions where he was working on a tree, you could certainly hear it, the sound was unmistakable and LOUD.
Alycia's parents had a Pileated Woodpecker in their backyard for a few months over the summer who hollowed out a significant size cavity on a dead tree. It was pretty impressive to see the size of the hole and the amount of sawdust and tree chunks produced by just one bird.