| Mexican blaxk water snake (Nerodia melanogaster) |
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| Is a enough snake common occupies the same niche that the green snake and is fed on the same, single that nerodia is a acuatic snake. Dark his coloration is gray and some have one l?a yellow in the back (to erythogaster). The belly in both species is of yellowish color. Like the previous species, dismiss the scent of musk. |