I know most people are leaning towards T marcianus or possible cross, but look closely at all 3 picks and there are only two snakes that are vurtually identical. The pattern on the second and third snakes are identical and nothing like the regular chequer board pattern of T marcianus in the first pic. Rather than just go off appearances has anyone compared scale counts yet? Taking into account, Pattern, position of lateral stripe, Supralabials etc... Some people are saying that the black marks on either side of the neck are so charictaristic of T marcianus and therefore must be a marcianus albeit a poor one. There are of course T radix with black marks in the same positions. I am sure that with the wealth of knowledge on here that this can finally be put to bed. There is no doubt in my mind that cross breeding has and probably does still go on, What people exactly intend to achieve with such practice is beyond me. As Greg has already pointed out in another post, With the vast natural variety that the Thamnophis Species offers this can only be detrimental to the hobby. As for the identity of the snake in question I myself am leaning 98% towards T radix.