#feather__plume__plumage  the light horny waterproof structure forming the external covering of birds
  supertype:  #body_covering  #animal_material
  subtype:  #down_feather  #aftershaft  #contour_feather  #bastard_wing  #marabou  #hackle  #flight_feather  #scapular
  substance:  #keratin  #melanin
  part of:  #bird
  part:  #vane__web  the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
     part:  #barb  one of the parallel filaments projecting from the main shaft of a feather
  part:  #quill.rib__calamus__shaft  the hollow shaft of a feather

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