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There are two schools of thought as to why the owls are here: a shortage of food, typically lemmings, up north. Or a bumper crop of young owls this year, pushing some of the young south as they temporarily disperse to new territory.
Food and Feeding: Since the Snowy Owl is distributed in the north around the world its diet is determined by the availability of food in the region it resides. On its breeding grounds in the far north lemming and voles are its major food source. Other prey is also common in its wintering grounds and as is available in the region. This list of foods taken includes small rodents such as mice, rats, moles, hares, and various other mammals including rabbits. Various birds are also common which include pheasants, grouse, quail, dove, domestic poultry, alcids (like dovekie), and various water foul often including ducks, grebes and even medium sized geese. The Snowy can locate prey strictly audibly and may plunge in the snow for visibly hidden rodents like lemmings. It usually hunts from an elevated position that can vary from a raised knoll to a treetop or telephone pole along the edge of a field. It often makes long low flights to capture prey on the ground or birds from the water's surface or pursues them in the air. It can hover and pounce on prey from the air or while on the ground. The Snowy is even said to catch fish, amphibians, and crustaceans.
Natural enemies include the Arctic fox, gulls, Bald Eagles, Peregrine Falcons, Snowy Owls, and Prairie Falcons.
Snowy owls typically feed on lemmings, mice and rats, though it has been documented that they will prey on black ducks, Canadian Geese, short eared owls, American Kestrels, Starlings, Great Blue Herons, and even other Snowy Owls!