It's the first white ring behind the head that goes underneath on the THROAT that you are really concerned about. See, just the fact that it is an albino proves beyound the shadow of a single doubt that it is at LEAST mostly (if not all L.t.nelsoni), but now we are trying to see if it has intermediate features or distict additional features of nelsoni or sinaloae.

Here is the link to a post I made a good while back regarding the distinct differences in good textbook specimens of nelsoni and sinaloae as described to science (from Williams Systematics 1978 revised second edition 1988)
Link


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"a snake in the grass is a GOOD thing"

serpentinespecialties.webs.com

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