Great Gray Owl

Strix nebulosa

The great grey owl 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. Source

Where it is now

In the last 8 weeks this bird was recorded 917 times across 16 areas (each area is a 5 degree square).

See the Great Gray Owl on the live map

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

Download every area as CSV

Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.