Look at the red on its chest- is that coloring normal? I didn't see any mention of it in my guidebooks. I thought it just bumped into something messy like fruit on a tree.
Note the black bars on the outer tail feathers. This is one of the ways to distinguish a Downy Woodpecker from a Hairy Woodpecker, yet apparently some Hairy Woodpeckers do show this. In which case the Downy's smaller size would be the giveaway.