卡普阿斯河
The World Wildlife Fund has divided Borneo into seven ecoregions: five areas of lowland forest; the central Borneo montane rain forests; and the Kinabalu montane alpine meadows. The lowlands are distinguished by climate (as the eastern side of the island is drier) or separated by the large Kapuas River and Barito River, which prevent animals and reptiles from spreading freely around the island.