#beaver  large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
  supertype:  rodent__gnawer__gnawing_animal__gnawinganimal  relatively small gnawing animals having a single pair of constantly growing incisor teeth specialized for gnawing
  member of:  genus_Castor
  subtype:  Old_World_beaver__Castor_fiber  a European variety of beaver
  subtype:  New_World_beaver__Castor_canadensis  a variety of beaver found in almost all areas of North America except Florida

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