Bornean Gibbon Hylobates muelleri

Bornean Gibbon Hylobates muelleri

Bornean Gibbon Hylobates muelleri



The Bornean Gibbon, also known as the Gray Gibbon or the Mueller’s Gibbon belongs to the genus Hylobates. The word Hylobates means ‘Forest Walker’ in Greek. The gibbons in this genus are known for the white circle of fur around their faces. They are known to communicate in species-specific song when defining territory or attracting mates. They sing in regional accents to each other, have long swinging arms, inquisitive natures and superior acrobatic skills, they spend most of their lives high up in the tree-tops.

Bornean Gibbons AKA Gray or Mueller’s Gibbons sing to each other in regional accents to attract mates and are highly social. Endangered in #Kalimantan @IUCNredlist due to #palmoil #deforestation. Support a prime-mate #Boycott4Wildlife

Bornean Gibbons are found in tropical evergreen forests of primary, selectively logged and secondary forest types of Borneo. These gibbons are arboreal, diurnal and frugviorous (preferring fruits high in sugar), but will also eat immature leaves and insects (Haimoff 1985, Leighton 1987, Rodman, 1976). They have been recorded from forests up to 1,500 m (Leighton 1987) with densities decreasing at higher elevations (V. Nijman pers. comm.). In Kutai National Park, average home range size was 36 ha (Leighton 1987). The Bornean Gibbon is known to interbreed with H. albibarbis in a wide area of central Borneo (Marshall, and Sugardjito 1986, Mather, 1992).

The Bornean Gibbon is threatened by habitat loss due the expansion of agricultural plantations, clear-felling for timber and, to a lesser extent, selective logging, all of which are exacerbated by forest fires associated with El Niño events (Bartlett 2007, Campbell et al. 2008, Cheyne et al. 2016). Illegal hunting and live capture for the pet trade pose additional threats (Nijman and Menken 2005).

IUCN Red List

Further Information

ICUN endangered logo

Marshall, A.J., Nijman, V. & Cheyne, S.M. 2020. Hylobates muelleri. The IUCN Red List of Threatened Species 2020: e.T39888A17990934. Downloaded on 05 February 2021.

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Published by Palm Oil Detectives

Hi, I’m Palm Oil Detective’s Editor in Chief. Palm Oil Detectives is partly a consumer website about palm oil in products and partly an online community for writers, scientists, conservationists, artists and musicians to showcase their work and express their love for endangered species. I have a strong voice for creatures great and small threatened by deforestation. With our collective power we can shift the greed of the retail and industrial agriculture sectors and through strong campaigning we can stop them cutting down forests. Be bold! Be courageous! Join the #Boycott4Wildlife and stand up for the animals with your supermarket choices

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