> but why is "big snake" so common? Well, over 40% of humanity has the Abrahamic religions in its cultural background at this point, and one of the foundationa

> but why is "big snake" so common? Well, over 40% of humanity has the Abrahamic religions in its cultural background at this point, and one of the foundational myths there is the evil snake which tempts primordial man, with god cursing man and snake to be eternal enemies. So you have one cultural artifact with a single source (ok, not really, but sort of) accounting for that. And Judaism, Islam and Christianity don't have mythical evil pigeons or rabbits.