Distribution. Uganda, along the N & NW shores of Lake Victoria, including Mabira Forest (most likely the type locality), Bujuko and Bukasa Forests, and along the E side of the Albertine Rift, especially in Kibale Forest National Park and the Bukoma area; it is also found in Sango Bay Forest and in Minziro Forest, NW Tanzania, both parts of the Minziro-Sango Bay Transboundary Site. in Cercopithecidae

Distribution. Uganda, along the N & NW shores of Lake Victoria, including Mabira Forest (most likely the type locality), Bujuko and Bukasa Forests, and along the E side of the Albertine Rift, especially in Kibale Forest National Park and the Bukoma area; it is also found in Sango Bay Forest and in Minziro Forest, NW Tanzania, both parts of the Minziro-Sango Bay Transboundary Site.