Kirk's red colobus is sometimes considered to be a subspecies of Pennant's red colobus, which would make its scientific name Procolobus pennantii kirkii.
Head and body length: Female: 53cm, Male: 63cm. Tail length: 42-80cm. Weight: Female: 7kg, Male: 10kg
Kirk's red colobus have a ragged, tessellated coat of red, black & white - but there is much individual variation. They have a bare black face with pink lips and mouth, with a long, limp, pale crown of hair.
They inhabit southern Zanzibar.
They live in rainforest, acacia woodland, swamp and scrub habitats.
They feed mainly on fruit and seeds.
Kirk's red colobus live in multi-male, multi-female groups, with an average of 20 members. They are diurnal and arboreal.
Little is known about the reproductive biology of Kirk's red colobus.
This species is not listed by the 2000 IUCN Red List.