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). While bonobos are today recognized as a distinct species, they were initially thought to be a subspecies of Pan troglodytes, because of the physical similarities between the two species.

Bonobos are distinguished from common chimpanzees by relatively long limbs, pinker lips, a darker face, a tail-tuft through adulthood, and longer, parted hair on their heads. Some individuals have sparser, thin hair over parts of their bodies. Bonobos typically live 40 years in captivity; their lifespan in the wild is unknown, but it is almost certainly much shorter. The bonobo is found in a 500,000 km² (190,000 sq mi) area within the Congo Basin of the Democratic Republic of the Congo (DRC), Central Africa.

Along with the common chimpanzee, the bonobo is the closest extant relative to humans. As the two species are not proficient swimmers, the natural formation of the Congo River (around 1.5–2 million years ago) possibly led to the isolation and speciation of the bonobo. Bonobos live south of the river, and thereby were separated from the ancestors of the common chimpanzee, which live north of the river. There are no concrete figures regarding population, but the estimate is between 29,500 and 50,000 individuals. The species is listed as Endangered on the IUCN Red List and is most threatened by habitat destruction, human population growth and movement (as well as ongoing civil unrest and political infighting), with commercial poaching being, by far, the most prominent threat.

Etymology

The bonobo was once called the "pygmy chimpanzee," even though it is about the same size as the common chimpanzee. This name was given by a German scientist named Ernst Schwarz in 1929. He thought the bonobo was smaller because of a mistake with a bone they thought was from a bonobo.

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

Taxonomy

The bonobo was first recognized as a distinct type in 1928 by a scientist named Ernst Schwarz. He noticed differences in a skull that had been thought to belong to a young chimpanzee. Later, in 1933, another scientist named Harold Coolidge decided that bonobos were their own species, not just a type of chimpanzee.

Bonobos and chimpanzees are the two species that make up the group called Pan, and 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 (99 lb), while females are lighter, averaging about 33 kilograms (73 lb). 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, but not as large as humans.

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 known for their kindness, patience, and sensitivity. They live in groups where females often play a leading role. These great apes show a variety of behaviors, including some forms of aggression, but they are generally less violent than their close relatives, the chimpanzees.

Studies have shown that bonobos can understand when humans don't know something, suggesting they may have a similar ability to humans to understand others' perspectives. Their social lives are complex, with strong bonds between females and various forms of interaction that help maintain group harmony.

Distribution and habitat

Bonobos live only in the humid forests of the Democratic Republic of Congo, specifically south of the Congo River and north of the Kasai River. The Congo River separates the homes of bonobos from those of chimpanzees, with bonobos living to the south and chimpanzees to the north.

Ecological role

Bonobos play a very important role in the Congo tropical rainforest by helping plants grow and spread their seeds. As one of the largest fruit-eating animals in this area, bonobos eat lots of fruit and spread the seeds through their waste. Each bonobo can spread around nine tons of seeds from over 91 different kinds of plants during its life. These seeds can travel several kilometers from where they were originally found, helping new plants grow far away from their parents.

Some plants depend on bonobos to help their seeds start growing again. Without bonobos, many of these plants would struggle to survive, which could harm the whole rainforest. The loss of bonobos or other animals that spread seeds would make it hard for the forest to stay healthy and full of trees.

Conservation status

The IUCN Red List lists bonobos as an endangered species, with estimates suggesting there are between 29,500 and 50,000 individuals 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 over 50,000 square miles (130,000 km²) of bonobo habitat. Groups like the Zoological Society of Milwaukee work on training local people, building schools, and teaching farming to reduce hunting. 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, which is also Valentine’s Day. This special day was started in 2017 by the African Wildlife Foundation to help raise awareness and support for bonobo conservation.