#genus_Mergus__Mergus  mergansers
  supertype:  bird_genus  a genus of birds
  member of:  subfamily_Merginae
  member:  merganser__fish_duck__sawbill  large crested fish-eating diving duck having a slender hooked bill with serrated edges
  member:  goosander__Mergus_merganser  common merganser of Europe and North America
  member:  American_merganser__Mergus_merganser_americanus  common North American diving duck considered a variety of the European goosander
  member:  red-breasted_merganser__Mergus_serrator  widely distributed merganser of America and Europe
  member:  smew__Mergus_albellus  smallest merganser and most expert diver; found in northern Eurasia

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