Or maybe just opportunistic? We have a Merlin that stakes out our bird feeders, even though they general prefer hunting in grasslands. This past January, I was able to catch it in the act , pretty sure he got one of out Downy Woodpeckers. Kind of a bummer for the woodpecker, they are fun to watch, but when you feed the birds, the birds you feed feed the birds you don't feed. Had to shoot through the kitchen window and screen which is why the lower half is a little fuzzy looking.