A Pileated Woodpecker.
Can you imagine a lifetime of pounding your head against a tree? Those who have been engineers do have some inkling of what that might be like considering the problems that you normally have to deal with.
This is not actually a tree. It is a telephone pole. I’m sure the city just loves knowing that their telephone poles are being used as bird houses. This hole goes in quite a distance, judging from how well the Woodpecker disappears when he enters it.