Flora ( Vegetation in East Borneo )
Vegetation types as a whole is tropical rainforest ecosystem and stretch of hilly forest. Dipterocarp primary rainforest is clearly dominating forest type, such as red shorea, yellow shorea, bangkirai, keruing, resak, mentiung and others. In Malinau, we can find one type of exotic fruit, red durian (duyan as local name) with basic meat of bright red fruits.
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Fauna in East Borneo
Diversity of wildlife in East Kalimantan is quite high. Some endemic species of threatened populations are an Orangutan (Pongo pygmaneus), Gibbon (Hylobates muelleri), Rangkong (Buceros rhinoceros) and Sun Bears (Helarctos malayanus). In addition there are clouded leopard, snake, partridge and other birds that steadily declining population.
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Orang Utan
Orang Utan (Pongo pygmaneus) are the largest arboreal mammals found on earth today. The decline of the species is predicted to continue at this rate, primarily because of forest loss due to conversion of forest to other land use function and fires. The Bornean orangutan is a fully protected species in Indonesia legislation. This species is listed on Appendix I of CITES and endangered in IUCN Redlist status.
Gibbons / Owa
Gibbons (Hylobates muelleri) is is generally common in areas where good forest remains. Deforestation and hunting are predominant threats for them. This Gibbon’s is listed on CITES Appendix I and endangered in IUCN Red list status.
Sun Bear
They are also known as "honey bear". Sun bears (Helarctos malayanus) are the smallest of the eight bear species. They are tree climbers and spend most of their time amongst the branches. Almost every sun bear has an individually distinct chest patch that is typically yellow, orange, or white, and may sometimes be speckled or spotted. Sun bears have recently been re-classified as Vulnerable on the IUCN Red List.
Rangkong
Rangkong (Buceros rhinoceros) is classified as Near Threatened (NT) on the IUCN Red List and listed on Appendix II of CITES. This species is largely restricted to extensive tracts of primary evergreen forest, and it is therefore likely to be declining moderately rapidly owing to habitat destruction.