Chimps also drop branches on intruders and sop up drinking water with leaves. While they cannot be described as fastidious or obsessively hygienic, chimps are known to use leaves as toilet paper and handkerchiefs, and twigs as toothbrushes. When successful, they often manage to open the lock. Like us, they can sometimes use their intelligence to escape from bondage. Male chimps like to throw missiles-whatever is handy, generally sticks and stones.
Females are much less interested in missiles.
Chimps would throw stones at the visitors who gawk at them in the traditional kind of zoo-if they had stones. As it is, all they have is feces. When wild chimps are presented with a fairly realistic mechanical leopard, after a reassurance frenzy of screams, hugs, and mutual mountings, they find appropriate clubs and beat the effigy to death-or at least until they knock the stuffing out. Or they'll pelt it with stones. Chimps have stunned or killed by throwing stones.