The Michigan DNR explains that snowy owls can be found moving into Michigan during winter when the food supply on the arctic tundra is in short supply. Snowy owls have been recorded as far south as Lansing, Michigan. Because they rarely see humans on their northern homes, they are not timid and can be easily viewed for long periods of time. The Owl Pages entry for the Snowy Owl (Bubo scandiacus) says in part:
The Snowy Owl is a large diurnal white Owl with a rounded head, yellow eyes and black bill. The name “scandiacus” is a Latinised word referring to Scandinavia, as the Owl was first observed in the northern parts of Europe. Some other names for the Snowy Owl are Snow Owl, Arctic Owl, Great White Owl, Ghost Owl, Ermine Owl, Tundra Ghost, Ookpik, Scandinavian Nightbird, White Terror of the North, and Highland Tundra Owl.
…Most hunting is done in the “sit and wait” style. These Owls are highly diurnal, although they may hunt at night as well. Prey are captured on the ground, in the air, or snatched off the surface of water bodies. When taking snowshoe hares, a Snowy Owl will sink its talons into the back and backflap until the hare is exhausted. The Owl will then break its neck with its beak. Snowy Owls have been known to raid traplines for trapped animals and bait, and will learn to follow traplines regularly. They also snatch fish with their talons. Small prey up to small hares are swallowed whole, while larger prey are carried away and torn into large chunks. Small young are fed boneless and furless pieces. Large prey are carried of in the Owl’s talons, with prey like lemmings being carried in the beak.
…Snowy Owls produce large, rough-looking cylindrical pellets with numerous bones, feathers, and fur showing. They are usually expelled at traditional roosting sites and large numbers of pellets can be found in one spot. When large prey are eaten in small pieces with little roughage, pellets will not be produced.