Hylobates muelleri
English: Mueller's Gibbon at the Cincinnati Zoo and Botanical Garden
Date 29 October 2009
Author Greg Hume (https://commons.wikimedia.org/wiki/User:Greg5030)
Source: https://commons.wikimedia.org/wiki/File:MuellersGibbon.jpg

Müller's Bornean gibbon (Hylobates muelleri), also known as the grey gibbon, is a primate in the gibbon family, Hylobatidae. Unlike other gibbon species, Müller's Bornean gibbon does not show sexual dimorphism in its fur coloration. Its fur is grey- or brown-colored with a ring of bright fur around its face. On the head, it often has a darkly colored cap. Weighing between 4–8 kg, it ranks among the smaller of the gibbons. Müller's Bornean gibbon is endemic to the island of Borneo, inhabiting the northern and eastern part of the island. In the southwest of the island lives the Bornean white-bearded gibbon; their territories hardly overlap.
Order: Primates
Family: Hylobatidae
Genus: Hylobates
Species: Hylobates muelleri Martin, 1841