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Message: <blockquote data-quote="njlarsen" data-source="post: 1603553" data-attributes="member: 7427">If I understand the PSC correctly, then every true subspecies would become a full species. Let us look at the situation in White-winged Dove: it used to have two subspecies in the US, an eastern on in Texas, and a more western one in NM, as far as I know. Then the human induced habitat changes led to range expansion into northern Texas of both populations where they inter breed freely. So not so long ago, PSC would have led to the conclusion that they were full species, but the current situation is that they are one interbreeding population where the two classical subspecies probably will end up being the extremes of a continuum. For that reason, I don't think that PSC necessarily gives a truer picture of biological diversity. Niels</blockquote>