Rubidus are extremely variable.
It seems like most of them in the US are the "dark phase"
Which look like a "flat black" eastern indigo wit white on the belly.
I have seem rub pictures that have mor reddish on them...
and have heard stories of rub's with lot of PINK
This pic is Brad S''s ligter phase, which looks an awful lot like erebenus, doesn't it?
Now, MAYBE...it's that the dark snakes like oldherpers are the true rub's and the others are rub's that integrade with other subs.
No matter how you look at it, there is a lot of work to be done with the Mexican Drymarchon. There is SO much integration going on. The photo that was posted months back of the orizibensis found road killed in the foothills of Veracruz (exactly where they historically supposed to be) looks just like a dark rub to me...
Bottom line...I REALLY believe that red snake is a rubidus-melanurus integrade. It sure doesn't look like a typical melanurus, yet it is WAY darker posteriorly than anteriorly...which is typical of melanurus, NOT rubidus. Rubidus, if anything, should be darker anteriorly on the dorsal.
That red snake was also found right aroud the southern range of Rub. and the northwestern range of melanurus.
That's my guess.
