The Great Horned Owl (Bubo virginianus) is found throughout most of North America and selected parts of South America. Unlike some of Michigan's birds, Great Horned Owls spend the winter here, nesting in January & February.
It's easier to hear these big predators, than to see them since they are active at night. Their hoot is the characteristic "who who." (Owling.com shares some recorded hoots.)
The owl's "horns" are not ears, just distinctive tufts of feathers.
Great Horned Owl territories often overlap with Red-tailed Hawks, with owls hunting at night and hawks hunting in daylight. Owl wing feathers are much softer than hawk feathers, allowing silent night flight. The stiff hawk feathers allow for higher speeds.
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.