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Red-sided garter snakes (Thamnophis sirtalis parietalis) are small nonvenomous colubrid snakes, a northeastern subspecies of a taxon (the common garter snake) that is widely distributed through North America.
The other snake I saw was a colubrid which I think was Coluber ventromaculatus.
This leaves open the possibility that vipers and elapids plus ‘ colubrids ’ may have evolved venom independently.
Among the more than 2,500 living species of snakes, mandibular transport mechanisms are known elsewhere only in a small number of cochleophagous (snail-eating) colubrids of the subfamilies Dipsadinae and Pareatinae.
It is usually assumed that albinism would be detrimental for a wild snake, but documented instances of albinism in natricines, and other colubrids , make this unclear.
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