I have never heard of an acorn woodpecker, but what they did to that tree is incredible! I really enjoy your nature and wildlife posts. Not that I don't like your other posts, but I am particularly drawn into these, I think it may be your own passion for it coming through :)
Plus I dearly love nature, trees in particular. I've never been to the west which is something I plan to remedy in the next year, two at most. Spending time in the redwoods has always been a goal of mine, the pictures alone make me feel like I'm looking a something out of a fairytale.