The concept, in other words what we concieve, of species is man made but the phenomenon of species is not manmade. It is natural, real and much more complex than our conceptualization of it. Ball pythons and blood pythons may be able to breed together but that doesn't make them the same thing. They are not only separated by terrain they are "made" by terrain. In other words the areas they inhabit are the areas they have adapted to inhabit. That is different from breeds of dogs which have been altered to fit man and have no natural niche other than what man makes for them or what the remains of their insticts allow them to exploit.

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