Great Grey Owl Identification Guide

Key Field Marks

• Size & shape: Length 61–84 cm (24–33 in), the longest owl species in the Northern Hemisphere, though its apparent bulk comes mostly from thick, fluffy plumage rather than actual mass.
• Head: Very large, round facial disc etched with fine concentric gray rings; small yellow eyes set relatively close together; no ear tufts, giving a smooth, round-headed silhouette.
• Plumage: Overall mottled gray with fine brown-gray barring and streaking, providing excellent camouflage against tree bark; a black-and-white "bow tie" patch is visible below the chin.
• Bill: Small, yellowish, largely obscured by facial feathering.
• Behavior: A sit-and-wait hunter that perches low over open ground, listening for small mammals moving under vegetation or snow, then drops down and plunges feet-first to seize prey. Flight is slow, silent, and buoyant on broad wings.

Separating Great Grey Owl from Similar Species

• Eagle Owl (Eurasian Eagle-Owl): Much bulkier and heavier with prominent ear tufts and large orange eyes, unlike the tuftless Great Grey Owl.
• Ural Owl: Smaller and paler, with dark eyes (not yellow) and a longer tail proportionally, and lacks the fine concentric rings on the facial disc.
• Tawny Owl: Considerably smaller and more compact, with dark eyes and rounder, less distinctly ringed facial disc.

Where & When to See One

The Great Grey Owl has a circumpolar distribution across the boreal forest (taiga) of Scandinavia, Russia, and northern Asia, as well as North America (where it is also called Great Gray Owl). It favors dense conifer stands next to open bogs, meadows, or clearcuts used for hunting, and is present year-round, though birds may wander south in winters when rodent populations are low.

Voice

A series of deep, soft, evenly spaced hoots — "whoo whoo whoo whoo" — delivered at a slow, steady pace and carrying surprisingly far given how muted the call sounds up close.