Just last week I heard a woodpecker raising cane on my back porch. As I opened the door I observed a large hawk with a woodpecker pinned down on the porch. When I stepped out, the hawk went one way and a slightly defeathered woodpecker went the other. Didn't get a good enough look at the hawk to tell what kind it was. I guess the hawk was using my bird feeder as a game baiting station.