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The chimpanzee has an advanced cognitive map of its home range and can repeatedly find food. [58] The chimpanzee builds a sleeping nest in a tree in a different location each night, never using the same nest more than once. Chimpanzees sleep alone in separate nests except for infants or juvenile chimpanzees, which sleep with their mothers. [59]
Chimpanzee nest. Nest-building is seen in chimpanzees who construct arboreal night nests by lacing together branches from one or more trees. They can also build nap nests to rest in the afternoon, these are usually more poorly constructed than the night nests and can be built both on the ground and on the trees.
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
The chimpanzee's arms are longer than its legs. The male common chimp stands up to 1.2 m (3.9 ft) high. Male adult wild chimps weigh between 40 and 60 kg [33] [34] [35] with females weighing between 27 and 50 kg. [34] When extended, the common chimp's long arms span one and a half times the body's height. [6]
Formerly the bonobo was known as the "pygmy chimpanzee", despite the bonobo having a similar body size to the common chimpanzee. The name "pygmy" was given by the German zoologist Ernst Schwarz in 1929, who classified the species on the basis of a previously mislabeled bonobo cranium, noting its diminutive size compared to chimpanzee skulls.
In September 2005, a two-and-a-half-year-old gorilla in the Republic of Congo was discovered using rocks to smash open palm nuts inside a game sanctuary. [79] While this was the first such observation for a gorilla, over 40 years previously, chimpanzees had been seen using tools in the wild 'fishing' for termites.
Bees play by rolling wooden balls — apparently for fun.The cleaner wrasse fish appears to recognize its own visage in an underwater mirror.Octopuses seem to react to anesthetic drugs and will ...
Central chimpanzees live in social groups of around 66 individuals, on average this tends to be more than the group size of western chimpanzee counterparts. It was found that chimpanzees split activity budget into four main categories. [5] In chimpanzees there exists male dominance within these social groups.