Muller’s Gibbon

Native to northeastern Borneo, the Muller’s Gibbon (or Bornean Gibbon) is grey-brown in color with a ring of bright fur surrounding its face. Characterized by the long arms typical of most gibbons, it uses these limbs to swing through the trees.

The Muller’s Gibbon is most commonly found in monogamous pairs and is highly territorial against intruders, often responding with loud singing. Interestingly, the female tends to be more dominant over the male, especially in terms of vocalizations, which is how the pair maintains a bond and establishes territory.

The Muller’s Gibbon also uses social grooming to reinforce bonds between individuals. An omnivore, it lives on a diet of fruits, immature leaves and insects that can be found within the rainforest. It is an important disperser of seeds for many tree species within the forest.