Lots of folks call the Northern Junco, Junco hyemalis, the Snowbird.
Groups of a half dozen or so frequent the spilled seed under the feeder. I also throw down a millet mix that they seem to like.
I saw my second hawk in the yard this morning--a beautiful silver and black flecked bird somewhat larger than a Blue Jay. I fumbled for the camera, then found I couldn't get a shot off. No CF card in the camera! By the time I was finally ready, my quarry was long gone. Ah well, no worries. I will be better prepared next time.