Climate change is another threat to Bornean orangutan conservation. Tidung speak Tidong language, a North Bornean language. Its skull is a little narrower than of Sumatran leopard cat and Bornean leopard cat. It is classified under the Bornean geographic group. The local folklore says that the name of the Bornean Rajah was Makatunao. The genome of the Bornean orangutan is programmed to be sequenced. It belongs to the North Bornean subdivision of the Austronesian language family. Asian elephants are divided into four sub-species, Sri Lankan, Indian, Sumatran and Bornean. Tapanuli orangutans diverged from Bornean orangutans about 674,000 years ago. A slight genetic difference is noted between the Western Sumatran and Bornean rhinos. One notable example is the Dayak people of Kalimantan in Borneo (Bornean traditional tattooing). The Bornean orangutan exhibits nest-building behavior. Bornean datus settled on the island of Panay. Tapanuli orangutans resemble Sumatran orangutans more than Bornean orangutans in body build and fur color. Good Friday, however, is only a public holiday in the two Bornean states.