1) Genus nerodia 2) North american water snakes 3) Reptile genus 
Nerodia is a genus of nonvenomous colubrid snakes commonly referred to as water snakes due to their aquatic behavior. The genus includes 9 species, all native to North America. == Description == Nerodia species vary greatly, but all are relatively heavy-bodied snakes, sometimes growing to 1.2 m (4 feet) or longer in total length. They have flatten...
[n] - North American water snakes
genus Nerodia noun North American water snakes