Fair enough. I don't have the same type experience as FR, but I have been watching a few populations of rattlesnakes since 03 and collected blood samples from many of these snakes plus a lab colony that represents ~ 25 years of collections data from the same area and at first the genetic data sent me spinning. I spent a lot of time thinking about it and this model is a very good explanation for the data. I see things much differently now than I did when I started, and field work has become much more rewarding/successful. I can go and find them just about anytime I want when the conditions are right.

Cheers,
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"Relax, Don't Worry, Have a Homebrew!" Charlie Papazian

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