Unidentified Bird Terrorizes Chimney

I noticed this bird on my neighbour’s chimney this morning. The photo was taken through binoculars. Can anyone identify the bird?

It has a slightly long thin beak, a thick red strip around the back of its head, what looks like a little black apron at the top of its breast, and black dots everywhere. It’s still there at the moment pecking away at the chimney. The rapid pecking sounds like a snare drum.

Click photo to enlargenate (view close-up on separate page).

UPDATE: It’s been identified as a Northern Flicker (photo). Wikipedia entry. Cool!