The Sunda flying lemur (Galeopterus variegatus), also known as Sunda colugo, Malayan flying lemur and Malayan colugo, is native to Southeast Asia ranging from southern Myanmar, Thailand, southern Vietnam, Malaysia to Singapore and Indonesia.[3]

Although it is called "flying lemur", it cannot fly but glides among trees and is strictly arboreal. It is active at night, and feeds on soft plant parts such as young leaves, shoots, flowers, and fruits. After a 60-day gestation period, a single offspring is carried on the mother's abdomen held by a large skin membrane.[4][5] It is a forest-dependent species.

The Sunda flying lemur is protected by national legislation. The Sunda flying lemurs are often hunted by local people with spears or other lethal equipment for various reasons such as food and fur. Habitat loss is known to occur intermittently, particularly in developing countries such as Malaysia.[3] In addition to deforestation and loss of habitat, local subsistence hunting poses a serious threat to this animal. Competition with the plantain squirrel (Callosciurus notatus) represents another challenge for this species. More information is needed on population declines, but at present, the rate of the decline is not believed to merit listing in any category lower than least concern.[2]