Great Gray Owl
Great Gray OwlGreat Gray OwlGreat Gray Owl

Great Gray Owl

Strix nebulosa

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Insufficient data
overall probability at Isle Royale National Park
1 Verified records at Isle Royale National Park
🌅 Crepuscular When it's active at dawn and dusk

The great grey owl (Strix nebulosa) (also great gray owl in American English) is a true owl, and is the world's largest species of owl by length. It is distributed across the Northern Hemisphere and is the only species in the genus Strix found in both Eastern and Western Hemispheres. Wikipedia →

Closest Relatives at Isle Royale National Park

Barred Owl
LC

Barred Owl

☀️🌙 Day & Night Bird

Strix varia

Insufficient data
Northern Hawk Owl
LC

Northern Hawk Owl

☀️ Diurnal Bird

Surnia ulula

Insufficient data
Long-eared Owl
LC

Long-eared Owl

☀️🌙 Day & Night Bird

Asio otus

Insufficient data
Great Horned Owl
LC Endemic

Great Horned Owl

🌅 Crepuscular Bird

Bubo virginianus

<5% · Rare
Northern Saw-whet Owl
LC Endemic

Northern Saw-whet Owl

☀️🌙 Day & Night Bird

Aegolius acadicus

Insufficient data

📅 Monthly Probability

📊

Fewer than 5 records of Great Gray Owl at Isle Royale National Park — not enough to chart months honestly.

🌅 When They're Spotted

Most active at dawn and dusk · across all parks (global)

🌅Crepuscular
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Elk Island National Park 🇨🇦 Canada
20–30%
2 Riding Mountain National Park 🇨🇦 Canada
20–30%
3 Yellowstone National Park 🇺🇸 United States
10–20%
4 Jasper National Park 🇨🇦 Canada
5–10%
5 Yosemite National Park 🇺🇸 United States
5–10%
6 Grand Teton National Park 🇺🇸 United States
5–10%
7 Banff National Park 🇨🇦 Canada
<5%
8 Great Bear Rainforest 🇨🇦 Canada
<5%
9 Kluane National Park 🇨🇦 Canada
Insufficient data
10 Białowieża National Park 🇵🇱 Poland
Insufficient data
11 Wrangell-St. Elias National Park 🇺🇸 United States
Insufficient data
12 Isle Royale National Park 🇺🇸 United States
Insufficient data
13 Glacier National Park 🇺🇸 United States
Insufficient data
14 Denali National Park 🇺🇸 United States
Insufficient data
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