#genus_Anser__Anser  typical geese
  supertype:  bird_genus  a genus of birds
  member of:  family_Anatidae
  member:  Chinese_goose__Anser_cygnoides  very large wild goose of northeast Asia; interbreeds freely with the graylag
  member:  graylag__greylag__greylag_goose__greylaggoose__Anser_anser  common gray wild goose of Europe; ancestor of many domestic breeds
  member:  subgenus_Chen__Chen  wild goose having white adult plumage
     member:  blue_goose__Chen_caerulescens  North American wild goose having dark plumage in summer but white in winter

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