Müller's (Bornean) Gibbon

Müller's gibbon, also referred to as the grey gibbon, is a captivating primate belonging to the gibbon family, Hylobatidae. Unlike some other species, there is no variation in fur color between males and females. These gibbons typically exhibit grey or brown fur, a striking ring of bright fur encircling their faces, and a dark cap atop their heads. With a weight range of 4-8 kg, they rank among the smaller gibbon species.

These gibbons are endemic to the island of Borneo, particularly in the northern and eastern regions. They do not cohabit with the Bornean white-bearded gibbon, which resides in the southwestern part of the island.

Grey gibbons are diurnal creatures that thrive in rainforests, employing their long arms to elegantly swing from tree to tree. They live in monogamous pairs, nurturing their offspring and demarcating their territory with loud and melodious songs. Their diet predominantly consists of fruit. Although detailed information about their breeding habits is limited, it is likely similar to that of other gibbon species.

Müller's gibbons are protected within several national parks and reserves across Indonesia and Malaysia. In Indonesia, they can be spotted in locations such as Betung Kerihun, Bukit Baka Bukit Raya, Kayan Mentarang, Kutai, Sungai Wain, and Tanjung Puting. In Malaysia, they are found in Pulong Tau, Lanjak Entimau Wildlife Sanctuary, and Semengok Forest Reserve.