In most cases of infanticide, you just assume it happened, but you don’t know for sure- a new male comes in and begins chasing the mom with baby — they disappear and when you come back the next day, the baby is gone, so you assume infanticide. This data, however, is from a database in which they used cases where they actually knew that infanticide had occurred.

The majority (67%) of all infanticides occur in one-male groups (n=23).

Most (21 or 91%) were committed by strange males.

Only 2 (< 10%) were committed by a male within the social group.