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Archive for March 7, 2017

Rare Winter Visitors – Great Gray Owls

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Great Gray Owls are impressive birds – at 27” in length, they are our largest owl (Great Horned Owl – 22”, Snowy – 23”) but at 2.4 pounds, not our heaviest (Great Horned Owl – 3.1 pounds, Snowy – 4 pounds). The feathers that make a Great Gray Owl look so massive are what keep it warm during winters in the northern boreal forests where it resides.

Most of a Great Gray Owl’s diet consists of rodents, and some winters, when prey is scarce, individuals wander south to southern Canada and northern U.S. to sustain themselves. Sometimes Great Gray Owls are highly irruptive, and the number of sightings in the Northeast is high. In the winter of 1978-79 there were over 150 sightings in New England and Quebec. While there were numerous sightings in southern Canada this winter, northern New England was visited by only a few individuals, including the one pictured (in central New Hampshire).

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