Well Mark I finally get why you think how you do. Its so clear to me now(for the moment) You seem the take a type of animal as a solid object and think of them from there.



In several of the paragraphs lately, you say, that it must be the different habitat that is causing the local differences in the Albigs. In this I agree, as in, totally agree.



I believe the wall that separates our thinking is which comes first, the horse or the cart. you think what drives Albigs is the exsisting Albigs(the cart) I and I think most biologist or at least many(I hope) believe its the enviornment, more specifically, the habitat, drives, controls and determines the evolution of a species.



As the habitat changes and it surely has and does, the exsisting species, must change to fit it, or become extinct. But please, its not so simple, any givin species, lives in and exsists in, a perfered habitat thats normal for its species. At the same time, that species explores marginal habitats, in which to colonize. Exsistance in marginal habitat, is either temporary or the colonies must change and adapt. Maybe Sam can help you with this, I am sure he can explain it better.



Remember, Africa is in a prolonged period of desertification(god I hope thats a good word)(drying out), and thats possibly the cause for the migration of characteristics amoung different albigs. The changing of the continent is causing islands of Albigs, when in historical times, they were more continious.



I believe, what I just explained, is considered a major cause of speciation(the development of new biological groups)



Its the enviornment(the horse) that causes speciation, not the species. Thank you FR

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