1,000 (1996). L2 users: 400 (2013 M. Donohue).
Papua Province, Pegunungan Bintang regency, Okbibab subdistrict, border area east and north of Sobger river, south of Ji mountain.
3 (Wider communication). Trade language in the area, extending to Papua New Guinea border.
None known. Yetfa and Biksi are 2 ethnic groups, speaking the same language.
Christian, traditional religion.