Very Determined...

The photos of the tree damage and the enormous pile of wood chips were created by one very determined Pileated Woodpecker. Dryocopus pileatus is an amazing crow-sized woodpecker. It is black with a flame red crest. It is the bird that "Woody Woodpecker" was fashioned after. You might be giving away your age, if you too remember this cartoon character.
Pileateds' have been known to make rectangluar holes in a tree, then after a year or so, return to the tree and built a nest of the opposite side of that same tree. In the meantime insects have taken up residence in the first hole so, there is a "pantry" of food just on the other side of the tree for the woodpecker.