> Male gorillas, particularly new dominant silverbacks, sometimes kill infants (infanticide) when taking over a group, a behavior that ensures the mother becomes fertile sooner for the new male to sire his own offspring, helping his genes survive, though it's a natural, albeit tragic, part of their evolutionary strategy and group dynamics
From Google:
> Male gorillas, particularly new dominant silverbacks, sometimes kill infants (infanticide) when taking over a group, a behavior that ensures the mother becomes fertile sooner for the new male to sire his own offspring, helping his genes survive, though it's a natural, albeit tragic, part of their evolutionary strategy and group dynamics