Species MammalsNorthern Flying Squirrel

Northern Flying Squirrel

Glaucomys sabrinus

UncommonMammal
Illustration of Northern Flying Squirrel (Glaucomys sabrinus)

The Northern Flying Squirrel is larger and more northerly than its southern counterpart, inhabiting boreal and montane forests across Canada and the northern United States. It has an unusually close relationship with underground fungi (truffles), which form the backbone of its diet and make it a key disperser of mycorrhizal spores. The squirrel's belly fur is white at the tips but gray at the base, distinguishing it from the southern species.

Habitat
Boreal and old-growth montane forests
Diet
Truffles, lichens, conifer seeds, and berries
How common
Uncommon

Best time to see a Northern Flying Squirrel

The best time to see a Northern Flying Squirrel is July–October, when about 66% of U.S. sightings happen, based on 949 research-grade iNaturalist observations.

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