It's this guy, a Hairy Woodpecker. These birds look identical, except the Hairy is a little bit bigger and it looks like his beak is a tiny bit longer.
According to the Wikipedia article about the Hairy Woodpecker (where I got the photo for this doodle), these birds aren't closely related, and the similarities of appearance are the result of convergent evolution (defined as "the acquisition of the same biological trait in unrelated lineages").
After I left that tree and as I was rounding the final curve in the path, I heard another woodpecker. I looked up to see where he was - directly overhead working on a pinecone.
These birds are very common, but I've never seen live specimens, until now. Very, very cool.
