Since homo sapiens follows a completely different moral code to the entire animal kingdom is it possible that humans fit outside the order of the rest of the animal kingdom?
It would help your point if you began to show that all animals have a universal rape, murder, and polygamy moral code. If you cannot show this then your attacking a strawman. Sure some animals may show one or more of these traits but so what? The best you can do is say humans are unlike some animals but your a far cry from showing that humans are unlike any animal.
I would also like to know why you decided to stick with only animals? Single celled, asexually reproducing organisms have, apparently, far stricter moral codes and are rightfully separated from the much more morally repugnant multicellular organisms.
The Canada Goose is on the moral high ground too come to think of it.