In English, the term Kalimantan refers to the Indonesian portion of the island of Borneo. While in Indonesian, the term "Kalimantan" refers to the whole island of Borneo. The non-Indonesian parts of Borneo are of Brunei (400,000) and East Malaysia (5,625,000), the latter comprising the states of Sabah, Sarawak and the federal territory of Labuan. The region within Indonesia is also known as Indonesian Borneo. Kalimantan's total area is 544,150 km2. Kalimantan is a huge, thinly populated territory of swamps, jungle, mountains, and rivers. Various Dayak tribes, which villages are scattered along the riverbanks, fill the island of Kalimantan. Ancient rainforests in the island is rich with flora and fauna. Traditional houses of Dayak tribes emphasised its "wings" in hornbill figures, which they believe to embody the Gods of the upper world.