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Bornean Gibbon

Hylobates muelleri

Summary 3

Müller's Bornean gibbon (Hylobates muelleri), also known as the grey gibbon, is a primate in the Hylobatidae or gibbon family.

Habitat and ecology 4

Habitat and Ecology

The species is found in tropical evergreen forests of primary, selectively logged and secondary forest types. Mueller?s gibbons are arboreal and diurnal, and frugviorous (preferring fruits high in sugar), but will also eat immature leaves and insects (Leighton 1987; Rodman 1978). They have been recorded from forests up to 1,500 m (Leighton 1987) or 1,700 m in Sabah (Yasuma and Andau 2000), with densities decreasing at higher elevations (V. Nijman pers. comm.). In Kutai National Park, average home range size was 36 ha (Leighton 1987).

Systems
  • Terrestrial

Physical description 5

Coloration of H. muelleri varies from gray to brown. The top of the head and the chest are darker than the rest of the body. Total body length ranges from 440 to 635 mm. Gray gibbons weigh between 4 and 8 kg. They have buttock pads, long canine teeth, and no tail. The basal part of the thumb extends from the wrist rather than the palm of the hand, allowing an extended range of movement.

Sexual dimorphism is not pronounced in H. muelleri. Males and females are similar in morphology.

Range mass: 4 to 8 kg.

Range length: 440 to 635 mm.

Other Physical Features: endothermic ; homoiothermic; bilateral symmetry

Sexual Dimorphism: sexes alike

Sources and Credits

  1. (c) Tim Ellis, some rights reserved (CC BY-NC), http://www.flickr.com/photos/14113765@N00/416911719
  2. (c) Greg5030, some rights reserved (CC BY-SA), http://commons.wikimedia.org/wiki/File:MuellersGibbon.jpg
  3. Adapted by Brian Martin from a work by (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Hylobates_muelleri
  4. (c) International Union for Conservation of Nature and Natural Resources, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/28156434
  5. (c) The Regents of the University of Michigan and its licensors, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/18651753

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