An NAS Alert just came through that the Northern watersnake (Nerodia sipedon), a species known only in the eastern half of North America, has been found in California. A 2007 publication in the journal Herpetological Review indicates that a breeding population has been established near Sacramento. It is likely that this was the result of someone was keeping the snakes as pets and decided to let them go in the wild. Now, California already has a Southern water snake (Nerodia fasciata), which begs the question: will they hybridize?
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