The Udzungwa red colobus[1] (Piliocolobus gordonorum), also known as the Uzungwa red colobus or Iringa red colobus,[2] is a species of primate in the family Cercopithecidae. It is endemic to riverine and montane forest in the Udzungwa Mountains in Kilolo District of Iringa Region in Tanzania.[2] It is threatened by habitat loss.