Great Gray Owl
Great Gray OwlGreat Gray OwlGreat Gray Owl

Great Gray Owl

Strix nebulosa

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Insufficient data
overall probability at Glacier National Park
4 Verified records at Glacier 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 Glacier National Park

Barred Owl
LC

Barred Owl

☀️🌙 Day & Night Bird

Strix varia

<5% · Rare
Great Horned Owl
LC Endemic

Great Horned Owl

🌅 Crepuscular Bird

Bubo virginianus

<5% · Rare
Northern Pygmy-Owl
LC Endemic

Northern Pygmy-Owl

☀️ Diurnal Bird

Glaucidium gnoma

<5% · Rare
Western Screech-Owl
LC

Western Screech-Owl

☀️🌙 Day & Night Bird

Megascops kennicottii

Insufficient data
Northern Saw-whet Owl
LC Endemic

Northern Saw-whet Owl

☀️🌙 Day & Night Bird

Aegolius acadicus

Insufficient data
Snowy Owl
VU

Snowy Owl

☀️ Diurnal Bird

Bubo scandiacus

Insufficient data
Flammulated Owl
LC

Flammulated Owl

☀️🌙 Day & Night Bird

Psiloscops flammeolus

Insufficient data
Short-eared Owl
LC Endemic

Short-eared Owl

☀️🌙 Day & Night Bird

Asio flammeus

Insufficient data
Boreal Owl
LC

Boreal Owl

☀️🌙 Day & Night Bird

Aegolius funereus

Insufficient data

📅 Monthly Probability

📊

Fewer than 5 records of Great Gray Owl at Glacier 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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