Humboldt's Flying Squirrel was only formally separated from the northern flying squirrel as a distinct species in 2017 based on genetic evidence. It inhabits the humid, old-growth conifer forests of the Pacific Coast and reflects blue-white under UV light—a unique characteristic among North American mammals. Like its close relatives, it relies heavily on truffles for nutrition.
Best time to see a Humboldt's Flying Squirrel
The best time to see a Humboldt's Flying Squirrel is June–September, when about 66% of U.S. sightings happen, based on 781 research-grade iNaturalist observations.
Not certain it is a Humboldt's Flying Squirrel? What animal is this? walks through what to check first and the lookalikes that catch people out.
Recent Humboldt's Flying Squirrel sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
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