Silvery Gibbon Hylobates moloch

Silvery gibbon - Hylobates Moloch

Silvery Gibbon Hylobates moloch


Java, Indonesia

The Silvery Gibbon is of genus ‘Hylobates’ which means ‘Forest Walker’ in Greek. They sing to each other in ‘local’ accents have thrilling acrobatic skills. Endangered on @IUCNRedList by deforestation incl. #palmoil #Boycott4Wildlife

The Silvery 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.

Confined to the western part of the island of Java, Indonesia, in the provinces of Banten, West and Central Java. Lowland and lower montane rainforest up to 2,400 m asl but usually below 1,600 m asl (Asquith 1995, Farida and Haran 2000, Iskandar 2007, Kim et al. 2010, Supriatna and Ario 2015). They can tolerate disturbed habitat, but are known to prefer floristically-rich patches of forest. The extirpation of at least seven former sub-populations has been documented (Asquith et al. 1995) and recent studies of three of the four largest remaining populations (Ujung Kulon NP, Haliman-Salak NP and the Dieng Mountains) suggest high probabilities of extinction within a 100-year period if current conditions do not change, or if they worsen (Smith et al. 2018).

The Silvery Gibbon is considered Endangered based on a suspected population reduction of 50% or more over the course of three generations (2001-2015, 2016-2030, 2031-2045). This ongoing decline is due to the combined threats of forest habitat loss and hunting for subsistence purposes, in addition to supplying the pet trade.

IUCN Red List

Further Information

ICUN endangered logo

Nijman, V. 2020. Hylobates moloch. The IUCN Red List of Threatened Species 2020: e.T10550A17966495. Downloaded on 06 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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