I asked a similar question here, and people referred to other animal species that kill their young:
http://answers.yahoo.com/question/index;_ylt=AvA7ObLSJrEMKm9FNC1HWCXsy6IX;_ylv=3?qid=20071126224757AAKNi7w
However, the real question is whether or not other members of the Primate family kill their (own) young. I'm sure that we could find some animal species that matches a particular human behavior, but comparing ourselves to other primates seems more appropriate.
FYI - I was originally writing about this story line: http://news.yahoo.com/s/ap/20071127/ap_on_re_us/child_s_remains
Tags: