#crest.outgrowth  a showy growth of e.g. feathers or skin on the head of a bird or other animal
  supertype:  #outgrowth__process__proces  a natural prolongation or projection from a part of an organism either animal or plant; "a bony process"
  subtype:  #tuft  a bunch of feathers or hair
  subtype:  #topknot  showy crest or knot of hair or feathers
  subtype:  #comb.crest__cockscomb__coxcomb  the fleshy red crest on the head of the domestic fowl and other gallinaceous birds

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