#bull_snake  any of several large harmless rodent-eating North American burrowing snakes
  supertype:  #colubrid_snake__colubrid  mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
  member of:  #genus_Pituophis
  subtype:  #gopher_snake__Pituophis_melanoleucus  bull snake of western North America that invades rodent burrows
  subtype:  #pine_snake  any of several bull snakes of eastern and southeastern United States found chiefly in pine woods; now threatened

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