Two snowy owls (Bubo scandiacus, formerly Nyctea scandiaca) rest together on a log near Boundary Bay, British Columbia, Canada. Snowy owls, like other owls, typically hunt at night and rest during the day. Snowy owls are rarely found as far south as the Canada/United States border, but do migrate that far once or twice a decade in a type of migration known as an irruption. Irruptions occur when the snowy owl population is too large for the food supply on the Arctic tundra, forcing them to spread out much farther than normal.
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