Bonobos2018-09-18T22:54:22+00:00

Bonobos (Pan paniscus) are found only in DR Congo. They live in fission-fusion societies of up to 100 individuals, usually splitting into small groups when searching for food during the day and coming back together to sleep at night. The bonobos’ generally peaceful, egalitarian, and cooperative society is attributed to the evolution of a highly complex social system. Females bonobos are dominant in bonobo society, with females forming tight bonds against males through same-sex socio-sexual contact that is thought to limit aggression. Fruit makes up half of bonobos’ diet, but they also eat vegetation and occasionally supplement their diet with insects, larvae, earthworms, eggs, and small mammals.

KEY STATISTICS

RANGE STATES

POPULATION

15,000-20,000

CONSERVATION STATUS

Endangered

GRASP & IUCN (2018). Report to the CITES Standing Committee on the Status of Great Apes. UN Environment, Great Apes Survival Partnership, Nairobi and International Union for Conservation of Nature, Gland.

Bonobos have black hair and black faces from birth, and pink lips, small ears, and wide nostrils. The long hair on the head looks as if it is parted and bonobos do not tend to go bald with age. Bonobos are born with a white tail tuft. The bonobo has a slim upper body, thin neck, narrow shoulders, and long legs.

Often confused with the common chimpanzee, the bonobo is generally considered to be the more gracile species, and has noticeably smaller head and ears, a flatter face, and a less prominent brow ridge. Adult bonobos retain the white tail tuft that common chimpanzees lose after infancy.

Body mass in male bonobos ranges from 34 to 60 kg (75 to 132 lb), against an average of 30 kg (66 lb) in females. From the nose to rump while on all fours, adult male bonobos measure 73 to 83 cm (2.4 to 2.7 ft), females 70 to 76 cm (2.3 to 2.5 ft). When adult bonobos stand up on both legs, they can attain a height of 115 cm (3.8 ft).

Bonobos occur only in DR Congo, and are confined to an island-block of forest comprising approximately one-fifth of the country. Their range extends from the Lualaba River in the east, to the Kasai/Sankuru Rivers in the south, and to the west as far as to the Bolobo village and around the Lake Tumba/Lac Ndombe area.

The extent of their potential range is estimated at approximately 500,000 km². Within this large forest zone, bonobos are absent or rare in many areas and common only in a few scattered localities.

Female bonobos reach sexual maturity at approximately 12 years of age. The gestation period is 220-240 days. They normally give birth to a single young. Offspring have a black face and hands, with ears hidden behind whiskers. The young are cared for until they are 4-5 years old, and females have 5-6 offspring in their lifetime.

A male bonobo remains with his mother’s group for life, whereas females leave the maternal group for another at maturity. The lifespan of bonobos in the wild is unknown, and 40 years in captivity.

VIRTUAL ECOTOURISM

Visit Lola Ya Bonobo the world’s only organization to provide lifetime care to bonobos orphaned by the illegal trade in endangered wildlife. They protect bonobos in the only country they are found – DR Congo.

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OTHER GREAT APES

CHIMPANZEES

Chimpanzees (Pan troglodytes) can be found from southern Senegal across the forested belt north of the Congo River to western Uganda and western Tanzania.

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GORILLAS

Gorillas (Gorilla gorilla and Gorilla beringei) are ground-dwelling apes occupying a variety of different habitats and elevations in central African forests.

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ORANGUTANS

Native to Malaysia and Indonesia, orangutans (Pongo pygmaeus and Pongo abelii) are found only on the islands of Borneo and Sumatra.

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