Glaucomys

Glaucomys is a small genus of flying squirrels in the family Sciuridae, comprising three extant species native to North America. The species are Glaucomys volans, the southern flying squirrel; Glaucomys sabrinus, the northern flying squirrel; and Glaucomys oregonensis, the Oregon flying squirrel.

These animals are medium-sized nocturnal rodents characterized by a patagium, a furred membrane that stretches between the front and hind limbs and enables gliding. They have large eyes adapted to darkness and soft fur that ranges in color from tan to gray, with lighter underparts.

Glaucomys species are found in forests across parts of Canada, the United States, and the Pacific Northwest. They depend on mature trees that provide cavities or branchy canopies for nests and shelter. They forage for seeds, nuts, fungi, fruits, buds, and occasionally insects.

They are primarily nocturnal and arboreal, gliding between trees to escape predators and locate food. Reproduction varies by species but generally includes one to two litters per year, with litters of two to six young.

Conservation status varies by species and region. The Oregon flying squirrel (G. oregonensis) is listed as threatened in parts of its range, largely due to habitat loss and fragmentation. The northern and southern flying squirrels face regional pressures but are not universally listed as threatened.