Orang utan, Tripa Peat Swamps. Medan, Indonesia. This series is part of a campaign in partnership with the Sumatran Orangutan Conservation Programme (SOCP), http://endoftheicons.wordpress.com/ . The three remaining coastal peat swamp forests of Aceh, Indonesia, namely Tripa, Kluet and Singkil, are among the most precious natural habitats in the world. They harbour the highest orangutan densities in the world and about 30% of the remaining 6,600 Critically Endangered Sumatran orangutans.