Sumatran flying squirrel

{{Short description|Species of mammal}}

{{Speciesbox

| status = DD

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Lee, B. |date=2016 |title=Hylopetes winstoni |volume=2016 |page=e.T10608A22244199 |doi=10.2305/IUCN.UK.2016-2.RLTS.T10608A22244199.en |access-date=12 November 2021}}

| genus = Hylopetes

| species = winstoni

| authority = (Sody, 1949)

}}

The Sumatran flying squirrel (Hylopetes winstoni) is a flying squirrel only found on the island of Sumatra. It is listed as data deficient on the IUCN red list. Originally discovered in 1949, it is known only from a single specimen. It is a nocturnal, arboreal creature, spending most of its life in the canopy. The Sumatran flying squirrel is threatened by a restricted range and habitat loss due to logging.

Unlike most other flying squirrels, it does not have a membrane connecting to its tail.