Indonesia (Sumatera); Malaysia (Peninsular Malaysia); Thailand
The Agile Gibbon occurs at highest densities in dipterocarp-dominated forests, but their known habitat ranges from swamp and lowland forests to hill, submontane, and montane forests (O’Brien et al. 2004; Yanuar 2009). Additionally, populations in Bukit Barisan Selatan National Park in Sumatra do not seem to avoid forest edges near human habitations (O’Brien et al. 2004), a behavior that has also been observed in the Batang Toru Forest Complex, North Sumatra, Indonesia (Nowak pers. obs.).
Agile Gibbons communicate in local accents, form close familial bonds and monogamous partnerships. They are #endangered in #Sumatra #Indonesia #Thailand and #Malaysia on @IUCNredlist by #palmoil #deforestation and other threats.Tweet
While they prefer undisturbed primary forest, some studies from Sumatra indicate that they can also be found in previously disturbed regenerating forest (Sultan et al. 2009; Lee et al. 2015). In southern Sumatra, populations were found up to 1,400 meters (O’Brien et al. 2004).
On Sumatra, this species is threatened by forest conversion, mining, road construction, human encroachment, and a subsequent opportunistic capture for the pet trade and in some areas human consumption. Forests, where they remain, are extremely fragmented (Estrada et al. 2017). Agricultural expansion (e.g., coffee, oil palm, and rubber), in addition to the expansion of pulp-paper and sawn-timber plantations, are currently the main drivers of forest loss on Sumatra (O’Brien et al. 2003).
Geissmann, T., Nijman, V., Boonratana, R., Brockelman, W, Roos, C. & Nowak, M.G. 2020. Hylobates agilis. The IUCN Red List of Threatened Species 2020: e.T10543A17967655. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T10543A17967655.en. Downloaded on 25 January 2021.
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