The Northern Shrike is a predatory songbird, that breeds in taiga and tundra and winters in southern Canada and the northern United States. It feeds on small birds, mammals, and insects, sometimes impaling them on spines or barbed wire fences. Like other shrikes, it kills more prey, if it can, than it can immediately eat or feed to nestlings. Such behavior was characterized by early observers as "wanton killing," but the Northern Shrike stores excess prey to eat later. Storing food is an adaptation for surviving periods of food scarcity. ~ All About Birds
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