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Bonobo

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The bonobo (Pan paniscus) is an endangered great ape living in Central Africa.

Pan paniscus (female)
Pan paniscus (female)

They are one of two species within the genus Pan. The other species is the common chimpanzee (Pan troglodytes). Scientists consider bonobos and chimpanzees to be the closest living relatives to humans (Homo sapiens). While they look similar, bonobos have distinct physical and behavioral traits. They are currently classified as an endangered species on the IUCN Red List. This status means they face a high risk of extinction in the wild.

Pan paniscus11
Pan paniscus11

Bonobos possess several unique physical characteristics that distinguish them from common chimpanzees. They generally have longer limbs and a more slender upper body. Their faces are dark, but they often have pink lips. They also feature long hair on their heads that forms a visible parting.

Compared to chimpanzees, bonobos have smaller heads and less prominent brow ridges. Female bonobos also have slightly more prominent breasts than other female apes. These physical traits often make bonobos appear more human-like in their posture. Most bonobos move through the forest using knuckle-walking on all fours.

A Bonobo at the San Diego Zoo "fishing" for termites
A Bonobo at the San Diego Zoo "fishing" for termites

Dietary habits also separate these two species. Bonobos are predominantly frugivorous, meaning they primarily eat fruit. In contrast, common chimpanzees are often highly omnivorous. Chimpanzees are known to hunt small monkeys, duiker, and other antelope. Bonobos live in various habitats within the Congo Basin. These include primary and secondary forests, as well as seasonally inundated swamp forests. Because of political instability and the timidity of the animals, field research in these habitats is difficult.

Les bonobos utilisent certaines feuilles aux vertus pharmacologique contre leurs parasites intestinaux
Les bonobos utilisent certaines feuilles aux vertus pharmacologique contre leurs parasites intestinaux

History shows how our understanding of the bonobo has evolved. In 1928, German anatomist Ernst Schwarz identified them as a distinct taxon. He initially worked with a skull in the Tervuren Museum in Belgium. Schwarz originally thought the skull was a juvenile chimpanzee. He published his findings in 1929, classifying them as a subspecies. However, in 1933, American anatomist Harold Coolidge elevated them to full species status.

Ulrik, jeune de 1 ans avec sa mère Uma. LuiKotale, RDC
Ulrik, jeune de 1 ans avec sa mère Uma. LuiKotale, RDC

The name "bonobo" was proposed in 1954 by Eduard Paul Tratz and Heinz Heck. The name may come from a misspelling of Bolobo, a town on the Congo River.

Grooming de Zoé
Grooming de Zoé

The separation of bonobos from chimpanzees is linked to geography. About 1.5 to 2 million years ago, the Congo River formed. Since bonobos are not proficient swimmers, the river acted as a barrier. This isolation led to speciation, where the two groups became different species. Bonobos live south of the river, while chimpanzee ancestors live to the north. DNA evidence suggests the two species diverged about 860,000 to 890,000 years ago. This divergence may have also been influenced by the spread of savannas.

6 bonobos WHCalvin IMG 1341
6 bonobos WHCalvin IMG 1341

Estimates suggest there are between 29,500 and 50,000 bonobos left in the wild. They face many serious threats to their survival. Habitat destruction and human population growth are major concerns. Commercial poaching is considered the most prominent threat to the species. Ongoing civil unrest and political infighting in the region also impact their safety. In captivity, bonobos typically live for about 40 years. Their exact lifespan in the wild remains unknown, but it is likely shorter.

Bonobo (Pan paniscus) at Lola Ya Bonobo - 3
Bonobo (Pan paniscus) at Lola Ya Bonobo - 3

Studying bonobos provides deep insights into human evolution. Because their musculoskeletal anatomy has changed very little, they are excellent models. They may represent the last common ancestor shared by humans and chimpanzees. Some researchers suggest bonobos resemble early human ancestors like Australopithecus. Others believe human ancestors may have passed through a "bonobo-like" phase. This phase might have included reduced aggression and specific anatomical changes.

Understanding their genetics helps scientists map the history of all primates.

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🖼️ Images & Media (13)
File:Pan paniscus (female).jpg
Pan paniscus (female).jpg
File:Bonobos Kanzi and Panbanisha with Sue Savage-Rumbaugh.jpg
Bonobos Kanzi and Panbanisha with Sue...
File:6 bonobos WHCalvin IMG 1341.jpg
6 bonobos WHCalvin IMG 1341.jpg
File:A Bonobo at the San Diego Zoo "fishing" for termites.jpg
A Bonobo at the San Diego Zoo "fishing"...
File:Bonobo sexual behavior 1.jpg
Bonobo sexual behavior 1.jpg
File:Pan paniscus11.jpg
Pan paniscus11.jpg
File:Bonobo (Pan paniscus) at Lola Ya Bonobo - 3.JPG
Bonobo (Pan paniscus) at Lola Ya Bonobo - 3.JPG
File:Grooming de Zoé.jpg
Grooming de Zoé.jpg
File:Les bonobos utilisent certaines feuilles aux vertus pharmacologique contre leurs parasites intestinaux.jpg
Les bonobos utilisent certaines feuilles...
File:Composite image of male chimpanzee (left) and male bonobo (right) (CC BY version).png
Composite image of male chimpanzee (left)...
File:Differences in the Cognitive Skills of Bonobos and Chimpanzees, 2010 study.png
Differences in the Cognitive Skills of...
File:Ulrik, jeune de 1 ans avec sa mère Uma. LuiKotale, RDC.jpg
Ulrik, jeune de 1 ans avec sa mère Uma....

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