Glaucomys sabrinus fuscus

Northern flying squirrels are strictly nocturnal gliders that navigate dense conifer canopies using a furred patagium stretching from wrists to ankles. They rely heavily on hypogeous fungi, excavating subterranean truffles and dispersing mycorrhizal spores that keep boreal root networks healthy. Communal nesting is a key winter survival strategy, with up to a dozen individuals huddling inside a single tree cavity to conserve heat against subzero temperatures.