North Carolina, Raptor, about 40 miles east of Greensboro.   They winter here, but I never see them at my suet feeders until January. While cold spells bring a lot more birds to the feeders, I also have more time to watch the birds when life slows a bit in January and February, and also add feeders and stay right on top of keeping them filled when the weather is cold. They have maybe been coming to the suet since November, but I wasn't around to watch.