![]() Leaves are used hygienically in wiping the mouth or other soiled body parts. Sticks are used to inspect dead pythons or other unfamiliar objects that might be dangerous. In threat displays, chimps throw rocks and drag and throw branches. Branches and leaves are detached and displayed during courtship. They crack hard nuts open by using stones, roots, and wood as hammers or anvils, and they use “leafy sponges” (a handful of folded leaves or moss) to drink water. Chimpanzees “fish” for termites and ants with probes made of grass stalks, vines, branches, peeled bark, and midribs of leaves. Various tools are used in several contexts. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives. ![]() Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Humle thinks that such violence may be more likely to occur in larger groups, where there is more competition for resources. The baby chimp may simply have been a source of nutrition to the adult that snatched it, says Nishie.Īt any rate, infanticide and cannabilism are extremely rare among chimpanzees, says Hulme. “I work with a chimp community in West Africa, and I have never witnessed any cases,” she says. And female chimpanzees have also been spotted killing the infants of other females when resources like food are scarce, says Humle. This allows them to mate with the mother, and to have more of their own offspring in the group. Male animals of many other species are known to kill young infants that aren’t related to them. In fact, when the female chimp did subsequently have another baby (pictured above), she disappeared for a month. “I would predict that she would go on ‘maternity leave’ next time,” she says. In this case, the mother may not yet have had a chance to learn about “maternity leave” if it was her first pregnancy, says Tatyana Humle at the University of Kent, UK. He says that his observation provides an obvious clue as to why chimpanzee mothers tend to hide away to give birth. This is the first time anyone has reported seeing a newborn chimpanzee cannibalised in this way, says Nishie. The researchers found him around 1½ hours later, sitting up a tree and eating the infant from the lower half of its body. So Nishie and his colleague Michio Nakamura were surprised when, at around 11 am one December day, a female member of the chimpanzee group they were observing began to give birth in front of the 20 other members.Īs soon as the baby was out – and before the mother had even had a chance to touch it – the baby was snatched away by a male member of the group, who then disappeared into the bush.
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