The Common Gliding Lizard (Draco sumatranus) is a lizard with elongated ribs and skin flaps on the sides of its body. When opened, these skin flaps allow it to glide between tree trunks. It is primarily a tree dweller, except that the females come down to the forest floor to lay eggs. The body length is of about 9 cm, with a slightly longer tail. The body is of a dark grey/brown colouration with stripes and patterns to help it camouflage against the tree trunks. The males have a yellow triangular flap of skin under the chin, the gular fold

Gular fold

A gular fold is a feature of the body of lizards. it is found on the ventral throat, and looks like a collar.-See also:* Gular , gular anatomical formations in other species...

, which is used to communicate with other lizards, mostly for mating. Females have a much smaller and blue flap. They feed on small insects.

They are relatively common in forests and in urban settings such as parks and gardens. They are found in Southeast Asia: Malaysia, Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

, Sumatra

Sumatra

Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

 and Borneo

Borneo

Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

.

It used to be thought of as a sub-species of Draco volans.