Relatively new to the taxonomy dilemma (and sometimes raging side discussions), I have done a fair amount of research in recent months about both Milks, Mexicana complex snakes and the Jalisco Milk vs. Ruthveni dilemma.

I've also researched Google & other Internet images of dozens of specimens. What I've come to find is that the hallmark trait of Ruthveni snakes seem to be the *square jaw*, almost like that of a Russian Rat snake, or certain Cobras. Nuevo Leons, Thayeri, whatever you wish to call them, seem to have a much more *rounded & pointed snout*.

Mutant? Maybe, but I'm not as concerned that Leonis, Thayeri or related snakes are bred to others of different areas, as long as they are the same subspecies. (If you breed a Celtic man from Leeds with a Celtic wife from Darby, their kids are still Celts - if you know what I mean.) I don't vote for mixing different subspecies or species, however. I’ve always been a locale-specific man.

1.0 Boa constrictor imperator (Hog Island)
0.1 Lampropeltis mexicana thayeri
1.0 Agrionemys horsfieldii kazakhstanica

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