A report of action which arrests and kills a baby, and is gathered and eaten all together. There was time when it was repeated. Various views were taken out. In almost all cases, the victim was a male. Other than this, it has not resulted in the elucidation of this phenomenon.

(Not only a chimpanzee but BONOBO, Gorilla, baboon, patas monkey, Hanuman,  Celebes, capchin monkey, howler monkey, ウーリークモザル, spider monkey, ring-tailed lemur of Madagascar, orangutan, etc. should be used as a photo combination, and should be shown, if a photograph like this .)