#genus_Natrix__Natrix  water snakes; a cosmopolitan genus
  supertype:  reptile_genus__reptilegenu  a genus of reptiles
  member of:  family_Colubridae
  member:  common_water_snake__banded_water_snake__Natrix_sipedon__Nerodia_sipedon  in some classifications placed in the genus Nerodia; western United States snake that seldom ventures far from water
  member:  water_moccasin__watermoccasin  any of numerous North American water snakes inhabiting fresh waters

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