500 (Van Driem 2007).
Central Bhutan, 3 enclaves west of Mangde river, 2 nearest river in Trongsa district; another in Wangdue Phodrang district; 5 Adha, Rukha, Wangling, Jangji, and Thrumzur villages; the 2 dialects are separated by the Black mountains.
None known. Retained complex verbal system of Proto-Tibeto-Burman.
Reportedly an ancient population of Bhutan.