Juncos Junco hyemalis are one of the birds that migrate to Michigan for the winter. They spend summer feeding and breeding in Canada. Some juncos are found as far south as Florida and Northern Mexico. In Kalamazoo, they are a consistent winter presence.
Juncos are members of the sparrow family. There are a number of different colorations for the Dark-eyed Junco, distinct enough that they were previously classified as separate species. Our local variation is known as the Slate-colored Junco or the Northern Slate-backed Junco. Informally, they're called snowbirds.
Juncos will readily come to bird feeders but they prefer to eat from tray feeders or seeds on the ground.
I teach economics at Kalamazoo College. My wife is also an economist. We were on sabbatical in Europe for the 2014-15 academic year. (Salamanca, Spain, followed by Oxford, UK.) We were in Uruguay for the 2006-7 academic year.