al Park (part of the UNESCO Rainforest World Heritage Site of Sumatra) and the Singkil Swamp Wildlife Reserve.

Te Sumatran orangutan’s habitat can be divided into two dis- tinct types: the wet coastal peat swamp forests, and inland for- ests on dryland mineral soils (Map 6).

Aerial shot of the Batang Toru river and the surrounding forest (Herman Rijksen)

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• Te orangutan distribution surface area on coastal peat swamp forests totals approximately 881 km2

. Tese are carbon-rich

peat swamp forests located in the regions of Tripa, Kluet and Singkil on the west coast of Aceh province.

• Te forests where orangutans occur on dryland mineral soils