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   Harlequin Duck
   Histrionicus histrionicus
 Male & Female
 Yellowstone National Park
 Wyoming
 14 May 2006
     
 by Paul Higgins
 ŠPaul Higgins
   Harlequin Duck
   Histrionicus histrionicus
 Male
 Yellowstone National Park
 Wyoming
 14 May 2006
     
 by Paul Higgins
 ŠPaul Higgins
   Harlequin Duck
   Histrionicus histrionicus
 Male
 Yellowstone National Park
 Wyoming
 14 May 2006
     
 by Paul Higgins
 ŠPaul Higgins
   Harlequin Duck
   Histrionicus histrionicus
 Male
 Yellowstone National Park
 Wyoming
 14 May 2006
     
 by Paul Higgins
 ŠPaul Higgins