A recent paper studies infanticide by Female Chimpanzees in the Bundongo Forest.
These observations document a systematic pattern of lethal aggression in female chimpanzees. Such infanticidal attacks are neither isolated events by pathological individuals nor mere biproducts of male aggression; they seem to be part of the female behavioural repertoire. In all cases, the remains showed significant bites to the head, almost certainly fatal in two cases, indicating that these were purposeful, not accidental, killings. Equally remarkable, at least one, but possibly more, cases were the result of coalitionary attacks by resident females. While male cooperation in aggressive attacks is well documented for chimpanzees 1 and 2, coalitionary aggression by unrelated females is not.
Maybe it’s reasons like these that make Christianists hostile to the idea of chimps being our closest living relatives. But, I can see the resemblance.
(Image: Francis Bacon, Pope and Chimpanzee 1962)