The Sumatran flying squirrel is known from its type locality in Aceh, northern Sumatra. A dark eye ring and tufts of hair on the cheeks and behind the ears are distinctive.
It has dark rings around the eyes and cheek-beard tufts. The underside hairs have white to pale ochre tips, with a pale band along the outer edge of the gliding membrane.
The species page says that its diet, reproduction, and ecology are unknown. It gives no species-specific behavioral observations.
An extinction-risk assessment has not been added yet.