Northern Shrikes Arriving
The Northeast loses a lot of songbirds to migration in the fall, but it gains a few as well, one of which is the Northern Shrike (Lanius excubitor). As days shorten and temperatures drop, this tundra-nesting bird migrates southward into southern parts of Canada and northern U.S., arriving in October and November on its wintering grounds. In some areas Northern Shrike movements and winter numbers have been associated with the movements of Snowy Owls and Rough-legged Hawks.
The Northern Shrike is highly unusual in that it is a predatory songbird. Birds, mammals and insects are preferred over nectar, nuts and seeds. During the winter it preys mainly on small mammals (voles, mice, shrews) and birds. The Northern Shrike often kills more prey than it can immediately eat or feed its young, storing the excess food to eat later when available living prey may be scarce. The manner in which it stores this extra food is what gave it the name “butcher bird;” it often impales prey on a thorn, broken branch or even barbed wire, or it wedges prey into narrow V-shaped forks of branches, where they hang until reclaimed by the shrike. (Photo by Mary Sue Henszey)
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