With the Ideology DLC you can have a whole colony of monsters!
A nomadic group of nudist cannibals? Go right ahead!
A matriarchal society where men are property and must where burkas? Yes.
Cave dwelling mushroom eaters with an eye gouging ritual since they all crave to be blind. Absolutely!
And that's all without the families and babies DLC!
With forward facing eyes we can infer that pikachu is a predator.