To return to the evolution thing briefly - development and speciallization within a species is evident. I'm not denying that. However, when these things happen, information is LOST. New information is not created. Diversity was possible within the genetic code of the creature, and due to environmental circumstances, individual animals with certain traits had the advantage over others, and so that trait became dominant, and the other genetic information was lost over time, or preserved in another variety of that species, living in different circumstances. I believe this is sometimes called micro-evolution. Macro-evolution, in which fish become birds, for example, and new genetic information is created, is an entirely different thing, and that is what evolution is based on. I do not believe this ever happened.