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Orangutan range and population estimates

Orangutan range and population estimates

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Uploaded 11 Mar 2013 by GRID-Arendal
Year: 2013 Author: Riccardo Pravettoni, GRID-Arendal
Description:
The orangutan is the only great ape found in Asia, and historically is thought to have once ranged across Indochina. Today, two distinct species are found on the islands of Borneo and Sumatra, respectively. The Bornean orangutan is divided into three further sub-species. Sumatran orangutan The Sumatran orangutan (Pongo abelli) has been listed as Critically Endangered since 2000 and its population has decreased by 80 per cent over the last 75 years (Wich et al. 2011). This species is native to the Indonesian island of Sumatra and today mainly inhabits the northern end of the island as a result of habitat loss and human encroachment. An estimated 6,600 wild individuals are left, based on nest density surveys and models applied to satellite images of forest distribution (Wich et al. 2008; Mittermeier et al. 2009), although extensive forest clearance and fires in Tripa in 2012 are likely to have reduced the overall number. Bornean orangutan The Bornean orangutan (Pongo p ...
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  • Great ape illegal trafficking “tariffs”
  • Great apes population estimates
  • Great apes range in Africa
  • Main international routes for the illegal trafficking of great apes