When the common chimpanzee moves on the ground it moves quadrupedally in a special position called knuckle-walking (Fleagle, 1988). In the tree this species also moves in a quadrupedal manner (Fleagle, 1988). The common chimpanzee also uses suspensory behavior in the trees to move around within a feeding source (Fleagle, 1988). On the ground the common chimpanzee will walk bipedally and this also occurs during dominance and aggression displays (Estes, 1991).
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