#petrel  relatively small long-winged tube-nosed bird that flies far from land
  supertype:  #pelagic_bird__pelagicbird__oceanic_bird__oceanicbird  bird of the open seas
  member of:  #family_Procellariidae
  subtype:  #white-chinned_petrel__whitechinnedpetrel__Procellaria_aequinoctialis  large black petrel of southern seas having a white mark on the chin
  subtype:  #giant_petrel__giantpetrel__giantfulmar__macronectesgiganteu  large brownish petrel chiefly of Antarctic seas
  subtype:  #fulmar_petrel__fulmar__Fulmarus_glacialis  heavy short-tailed oceanic bird of polar regions
  subtype:  #shearwater  long-winged oceanic bird that in flight skims close to the waves
     subtype:  #Manx_shearwater__Puffinus_puffinus  small black-and-white shearwater common in the eastern North Atlantic
  subtype:  #storm_petrel__stormpetrel  any of various small petrels having dark plumage with paler underparts
     subtype:  #stormy_petrel__northern_storm_petrel__Hydrobates_pelagicus  sooty black petrel with white markings; of the north Atlantic and Mediterranean
     subtype:  #Mother_Carey's_chicken__Mother_Carey's_hen__Oceanites_oceanicus  medium-sized storm petrel

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