Illustration © David Allen Sibley.
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Text © Kenn Kaufman, adapted from
Lives of North American Birds
Adult. Photo: Melyssa St. Michael/Audubon Photography Awards
Great Gray Owl
Strix nebulosa
| Conservation status | Much of range is remote from impacts of human activities. In southern parts of range, has probably declined because of habitat loss and disturbance. |
|---|---|
| Family | Superb Owls |
| Habitat | Dense conifer forests, adjacent meadows, bogs. Generally favors country with mix of dense forest for nesting and roosting, and open areas for hunting. In the north, mostly around bogs, clearings, and burns in extensive coniferous woods; in the west, mostly around meadows in mountain forest. |
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Feeding Behavior
May hunt by day or night. In summer, daytime feeding is usually near dawn or dusk. Usually hunts by listening and watching from a perch, swooping down when it locates prey; sometimes hunts by flying low over open areas. Can locate prey by sound, and will plunge into snow to catch rodents more than a foot below the surface.
Eggs
2-5. White. At times, may lay more eggs in years when food is abundant. Incubation is by female only, 28-36 days. Male brings food to incubating female on nest. Young: Female broods young for first 2-3 weeks. Male brings food to nest, and female feeds it to young. Young may climb out of nest and perch in nest tree or nearby trees after 3-4 weeks, are able to fly 1-2 weeks later. In some areas, adult female departs after young fledge, while male remains with them and feeds them for up to 3 months.
Young
Female broods young for first 2-3 weeks. Male brings food to nest, and female feeds it to young. Young may climb out of nest and perch in nest tree or nearby trees after 3-4 weeks, are able to fly 1-2 weeks later. In some areas, adult female departs after young fledge, while male remains with them and feeds them for up to 3 months.
Diet
Mostly small mammals. Feeds mainly on voles in many northern areas; in western United States, pocket gophers may be main prey. Also eats mice, shrews, squirrels, weasels, small birds, rarely frogs.
Nesting
In courtship, male may feed female; members of pair preen each others' feathers. Nest: Usually uses old abandoned nest of other large bird, such as goshawk, raven, Osprey; sometimes nests on top of broken-off snag or stump, rarely on the ground. Site usually 10-50' above ground. A pair may reuse the same nest for several years.
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- All Seasons - Common
- All Seasons - Uncommon
- Breeding - Common
- Breeding - Uncommon
- Winter - Common
- Winter - Uncommon
- Migration - Common
- Migration - Uncommon
Songs and Calls
Very deep, booming whoo, repeated 10 times or more, and gradually descending the scale.How Climate Change Will Reshape the Range of the Great Gray Owl
Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future.
Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures.
Climate threats facing the Great Gray Owl
Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.
