Red colobuses are Old World monkeys of the genus Piliocolobus. It was formerly considered a subgenus within the genus Procolobus, which is now restricted to the olive colobus. They are closely related to the black-and-white colobus monkeys, and some species are often found in groups with the blue monkey. The western red colobus is frequently hunted by the common chimpanzee.
Red colobus
Image: Piliocolobus pennantii
Image: Preuss's red colobus
Image: Piliocolobus rufomitratus 35499959 (cropped)
Old World monkeys are primates in the family Cercopithecidae. Twenty-four genera and 138 species are recognized, making it the largest primate family. Old World monkey genera include baboons, red colobus and macaques. Common names for other Old World monkeys include the talapoin, guenon, colobus, douc, vervet, gelada, mangabey, langur, mandrill, surili (Presbytis), patas, and proboscis monkey.
Old World monkey
A male rhesus macaque (Macaca mulatta)
Young collared mangabey (Cercocebus torquatus).
Black-footed gray langur, (Semnopithecus hypoleucos)