#rat_snake__ratsnake  any of various nonvenomous rodent-eating snakes of North America and Asia
  supertype:  colubrid_snake__colubrid  mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
  subtype:  corn_snake__red_rat_snake__redratsnake__Elaphe_guttata  large harmless snake of southeastern United States; often on farms
  subtype:  black_rat_snake__blackratsnake__blacksnake__pilot_blacksnake__pilotblacksnake__mountain_blacksnake__Elaphe_obsoleta  large harmless shiny black North American snake
  subtype:  chicken_snake__chickensnake  large North American snake
  subtype:  Indian_rat_snake__Ptyas_mucosus  enter buildings in pursuit of prey

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