The Tidung, Tidong (Jawi: تيدوڠ) are a native group originating from northeastern part of Borneo and surrounding small islands. They live on both sides of the border of Malaysia and Indonesia. Tidung speak Tidong language, a North Bornean language. The Tidong are traditionally farmers practising slash-and-burn agriculture. Some are ocean fishermen. They grow sweet potatoes, cassava, lentils, fruits, and vegetables. Their farming methods are often accused of being the main cause of forest fires in Kalimantan.