The Pileated woodpecker is a local, year round resident here in Copper Harbor. It is the largest North American woodpecker (besides the Ivory Billed, thought to be extinct) about the size of a crow. Their holes are unique in that they have squared off edges and rectangular holes rather than round, and of course, they are also very large.
This is some current work from a local woodpecker – The photo of the bird is not current, but is posted to show what the culprit looks like. It was taken here in Copper Harbor.