Kipunji

The kipunji's relatively long pelage is light or medium brown with white on the end of the tail and the ventrum. The pelage close to the hands and feet tends to be a medium to dark brown. Its hands, feet, and face are all black. It does not appear to show any sexual dimorphism in relation to pelage coloration. Adult male kipunjis have a body length of 85–90 cm (33–35 in) and are estimated to weigh between 10 and 16 kg (22 and 35 lb). The kipunji has a distinctive territorial call — a low-pitched "honk-bark". Its nearest relatives are said to make a very different sound, "whoop-gobbles". The kipunji's pelage coloration and its broad crest of hair on the crown of its head helps to distinguish it from Cercocebus and Lophocebus.

Around 1,800 individuals live in mountainside trees in Tanzania. A census published in 2022 found 59 groups in Livingstone Forest (within Kitulo National Park), Mount Rungwe Nature Reserve, and Madehani Village Forest. The forest at Rungwe is highly degraded, and fragmentation of the remaining forest threatens to split that population into three smaller populations. The Ndundulu forest is in better shape, but the population there is smaller.