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Female Greater Scaup on left, Female Lesser Scaup on right)

   Lesser Scaup
   Aythya affinis
 Salem Pond
 Utah County, Utah
 18 Jan 2019
    
 by Cliff Miles
 ©Cliff Miles
   

 Lesser Scaup
 Aythya affinis

 Male & Female
 Bolsa Chica, California
 25 Nov 2000

 by Margaret T. Sanchez
 ©Margaret T. Sanchez

Female on the left, two males on the right

   Lesser Scaup
   Aythya affinis
 Powell Lake
 Lehi, Utah
 3 Apr 2014
  
 by Cliff Miles
 ©Cliff Miles