Not nest-builders themselves, they seek out cavities in broken tree tops or stick nests abandoned by other large forest-dwelling birds. Most great gray owls nest in the dense northern boreal forests across North America and Eurasia. The abundance of food in the area usually affects the number of eggs a female lays, a feature quite common in northern owl species. Great grey owls do not build nests, so they typically use nests previously used by a large bird, such as a raptor. Optical Character Recognition converts non-selectable text from scanned documents into editable Office files. Easily convert your PDF files into easy to edit DOC and DOCX documents.

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As the owlets matured and began flying they came for the prey on their own. One alert landowner in northeast Oregon, Andy Huber, helped a female great grey owl raise her four nestlings after a great horned owl killed the male. If food is scarce, they may travel a fair distance to find more prey, with considerable movements by large numbers in some years of particularly scarce prey.
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• In mated pairs, the male is the primary hunter who provides food for the entire family while the female guards and broods the eggs, nestlings, and flightless fledglings.
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• Most great gray owls nest in the dense northern boreal forests across North America and Eurasia.
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• In these areas slowly walk the perimeter of a meadow or other opening looking for dark figures in trees.
• Great gray owls primarily vocalize during the breeding season.
• Tame owls may produce higher-pitched hoots when given food by humans.

Climate Threats Facing the Great Gray Owl

In northern Canada and other parts of Scandinavia, they eat lemmings primarily. What species they eat depends on which small mammals are most abundant and available. They then can crash to a snow depth roughly equal to their own body size to grab their prey. They have excellent hearing, and may locate (and then capture) prey moving beneath 60 cm (2.0 ft) of snow in a series of tunnels solely with that sense. On the nesting grounds, they mainly hunt at night and near dawn and dusk; at other times, they are active mostly during the night. Huber live-trapped small mammals and then released them at the nest site, and the female took these to the nestlings.

Great grey owl

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• In terms of length, the great grey owl is believed to exceed the Eurasian eagle-owl and Blakiston’s fish owl as the world’s largest owl.
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• In the stillness of a cold mountain meadow, this elusive giant quietly floats on broad wings across meadows and openings in evergreen forests.
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Convert PSD files into professional-grade PDF documents, ideal for sharing and printing. Using mice to bait or lure in owls (of any species) should be avoided all together. Among other threats, ravens and GreatHorned Owls prey on eggs and nestlings.Great Grey Owls are semi-nomadic, with irregular site or mate fidelity between years.
Living in the Nearctic biogeographic province, the northern part of the New World. The owl has a distinctive facial disk, with two obvious gray concentric circles. You'll find plans for building a nest structure of the appropriate size on our All About Birdhouses site.

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The male typically approaches the female, holdingfood in its beak, which is passed with both birds closing their eyes. The female lays 3 to 5 eggs (more in a good prey year) and incubates them exclusively while the male brings her food. Great gray owl young are vulnerable to forest raptors, like the northern goshawk (Accipiter gentilis) or the fierce great-horned owl. Other prey on the menu for these owls include weasels, robins, grouse, and frogs. Low vole populations, in fact, can significantly lower owl reproduction and trigger mass owl movements south (irruptions) in search of food for the winter. The only known predator of adult great grey owls is the Eurasian eagle-owl (Bubo bubo), which occasionally preys on the former in parts of Europe.

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