Woodpecker at the Bird Feeder?

He came a couple of times, but I never was able to get a picture. Who knew that red-headed woodpeckers ate seeds? I thought they ate insects from the inside of trees. He wasn't really all that big, but looked really huge at the feeder compared to the finches, titmice, and waxwings that have been the most frequent visitors. He was a lot bigger than the cardinals, too.