2,000 (2000 SIL). Many monolinguals.
Madang Province southwest, southwest Mid-Ramu district, west Schrader range, west of the Kobon [kpw] language area.
Central Waibuk (Mambar), North Waibuk (Hamil), South Waibuk (Arama). Related to Pinai-Hagahai [pnn], though not inherently intelligible. Word taboo practiced, but does not seem to impede intelligibility among related language varieties. Lexical similarity: 37% with Pinai-Hagahai [pnn], 35% with Kobon [kpw].
SOV; postpositions (few); genitives precede noun heads; possessives, adjectives, numerals, relative clauses follow noun heads; postclitic demonstratives; suffixes; V, CV, VC, CVC
Some similarities to Kalam languages due to borrowing (Comrie 1988). More loanwords from Kobon used in the northern area.