Bonobo

The bonobo (/bəˈnoʊboʊ, ˈbɒnəboʊ/; Pan paniscus), also historically called the pygmy chimpanzee (less often the dwarf chimpanzee or gracile chimpanzee), is an endangered great ape and one of the two species making up the genus Pan (the other being the common chimpanzee, Pan troglodytes).

Bonobos are different from common chimpanzees because they have longer arms, pinker lips, a darker face, a tail-tuft when they grow up, and longer, parted hair on their heads. Some have thinner hair on parts of their bodies. Bonobos can live about 40 years in zoos; we do not know exactly how long they live in the wild, but it is probably shorter. The bonobo lives in a large area of 500,000 km² (190,000 sq mi) in the Congo Basin of the Democratic Republic of the Congo (DRC), Central Africa.

Along with the common chimpanzee, the bonobo is our closest living relative. Because neither species can swim well, the natural formation of the Congo River (around 1.5–2 million years ago) may have separated bonobos from common chimpanzees. Bonobos live south of the river, while common chimpanzees live north of it. There are no exact numbers about how many bonobos there are, but estimates suggest between 29,500 and 50,000 individuals. The species is listed as Endangered on the IUCN Red List. The biggest threats to bonobos are loss of their homes, growth of human populations, and hunting for meat.

Etymology

The bonobo used to be called the "pygmy chimpanzee." It is about the same size as the common chimpanzee. A German scientist named Ernst Schwarz gave it this name in 1929. He thought the bonobo was smaller because of a mistake with a bone.

In 1954, two scientists, Eduard Paul Tratz and Heinz Heck, started using the name "bonobo." They thought it should have its own special name. The name might have come from a misspelling on a box from Bolobo near the Congo River, where the first bonobos were found.

Taxonomy

The bonobo was first recognized as a different kind of animal in 1928 by a scientist named Ernst Schwarz. He saw differences in a skull that people thought belonged to a young chimpanzee. In 1933, another scientist named Harold Coolidge decided that bonobos were their own special species, not just a type of chimpanzee.

Bonobos and chimpanzees are the two species that make up the group called Pan. They are our closest living relatives. Even though bonobos and chimpanzees look similar, they have lived apart for around 900,000 years, separated by the Congo River. Scientists study them to learn more about human evolution and our ancient ancestors.

Description

The bonobo is a slender and graceful great ape, smaller than the common chimpanzee. Adult males usually weigh around 45 kilograms, while females are lighter, averaging about 33 kilograms. Bonobos have a smaller head with less bony ridge above the eyes, a black face, pink lips, and long hair on their heads. Females have slightly larger breasts than other female apes.

Bonobos move around mostly on all fours, but they can also walk on two legs, especially when food is easy to reach. Their body shape and facial features make them look more like humans than common chimpanzees do. Each bonobo looks unique, which helps them recognize one another in social groups.

Behaviour

Bonobos are kind, patient, and sensitive. They live in groups where females often help guide the group. These great apes show different behaviors, sometimes including aggression, but they are usually less violent than their close relatives, the chimpanzees.

Studies show that bonobos can understand when humans do not know something, which suggests they may have a similar ability to humans to understand others' perspectives. Their social lives are complex, with strong bonds between females and many ways of interacting that help keep the group peaceful.

Distribution and habitat

Bonobos live only in the humid forests of the Democratic Republic of Congo. They stay south of the Congo River and north of the Kasai River. The Congo River keeps bonobos separate from chimpanzees. Bonobos live south of the river, and chimpanzees live north.

Ecological role

Bonobos help plants grow in the Congo tropical rainforest. They eat lots of fruit and spread the seeds when they leave waste. Each bonobo can spread seeds from over 91 kinds of plants. These seeds can travel far, helping new plants grow.

Some plants need bonobos to help their seeds grow. Without bonobos, these plants might have trouble surviving. This could hurt the whole rainforest.

Conservation status

The IUCN Red List lists bonobos as an endangered species. There are not many bonobos left in the wild. The biggest threats to bonobos are habitat loss and hunting for bushmeat. These threats grew worse during conflicts in the Democratic Republic of Congo.

Conservation efforts for bonobos focus on working with local communities. Projects like the Bonobo Peace Forest Project aim to protect bonobo habitat by creating community-managed reserves. These efforts help protect bonobo habitat. Groups like the Zoological Society of Milwaukee work on training local people, building schools, and teaching farming. With support from many organisations, there is hope for bonobo survival, but success depends on involving local communities.

In human culture

World Bonobo Day is celebrated on February 14, the same day as Valentine’s Day. This special day began in 2017 by the African Wildlife Foundation. It helps people learn more about and support bonobo conservation.