Being an indigenous tribe in central Borneo, the Kayan people are similar to their neighbours, the Kenyah tribe, with which they are grouped together under the Bahau ethnic group. The population of the Kayan ethnic group may be some 27,000. They are part of a larger grouping of people referred to collectively as the Orang Ulu, or upriver people. Like some other Dayak people they are known for being fierce warriors, former headhunters, adept in dry-rice cultivation, and having extensive tattoos and stretched earlobes amongst both sexes.