Their behaviour is quite different from any other behaviour known in chimpanzees: Attacks like this are carefully planned, done only when success is likely, and carried out in silence. It can take years for this to happen but, when it does, the remaining females and the neighbouring territory are added to the now larger group. In Gombe, Tanzania, a group in the 1970s was seen to kill seven of their neighbours one by one, until all were gone. Males work together when they spot a chance to make a lightning raid on an isolated male from the other group. If they can, male chimpanzees try to kill the male members of neighbouring groups. Researchers have also found that lower-ranking males often trade the meat for mating privileges such trades may help prevent inbreeding by keeping a single group of males from fathering the majority of a troop’s children". All told, chimps may kill and eat a third of the Gombe’s Colobus population each year. During one hunting binge, chimps killed 71 colobus monkeys in 68 days one chimp alone killed 42 monkeys over five years. One recent Gombe study, for instance, concluded that the 45 members of one troop ate a ton of monkey meat per year. "Goodall’s Gombe data have also led researchers to take a closer look at the role that hunting plays in chimp feeding habits. This was a major scientific discovery: it challenged previous ideas of chimp diet and behavior. The chimps at Gombe kill and eat as much as one-third of the Colobus population in the park each year. The others then each took parts of the carcass, sharing with other members of the troop in response to begging behaviours. Then one chimpanzee climbed up and captured and killed the monkey. Goodall watched a hunting group isolate a monkey high in a tree, block all possible exits. Jane Goodall discovered that chimps hunt and eat smaller primates such as Colobus monkeys. The biggest threats to the common chimpanzee are habitat destruction, poaching and disease. They live in the forests and savannahs of West and Central Africa. There are between 170,000 and 300,000 individuals. The common chimpanzee is listed on the IUCN Red List as an endangered species. So although it is mainly a herbivore, it does eat other animals to some extent. The species has also been seen making sharpened sticks to spear Senegal bushbabies out of small holes in trees. They use them for getting honey, termites, ants, nuts, and water. Nearly all chimpanzee populations have been seen using tools, modifying sticks, rocks, grass, and leaves. Disputes can generally be settled without the need for violence. The species lives in a male-dominated strict hierarchy. The common chimpanzee lives in groups which range from 15 to 150 members, although individuals travel and forage in much smaller groups during the day. The infant is weaned at about three years old, but usually maintains a close relationship with its mother for several more years it reaches puberty at the age of eight to 10, and its lifespan in captivity is about 50 years. The common chimpanzee is more robust than the bonobo, weighing between 40 and 65 kg (88 and 143 lb) and measuring approximately 1.3 to 1.6 m (4 ft 3 in to 5 ft 3 in). The common chimpanzee is often called the chimpanzee (or "chimp"), but this may mean both species in the genus Pan: the common chimpanzee and the closely related bonobo.Įvidence from fossils and DNA sequencing show both species of chimpanzees are the closest living relatives to modern humans.
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