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   Lesser Scaup
   Aythya affinis
 Male
 Provo River
 Provo, Utah
 17 Feb 2023
  
 by Keith Lane
 ŠKeith Lane
   Lesser Scaup
   Aythya affinis
 Male
 Provo River
 Provo, Utah
 17 Feb 2023
  
 by Keith Lane
 ŠKeith Lane
   Lesser Scaup
   Aythya affinis
 Male
 Bolsa Chica E. Reserve
 Huntington Beach, California
 7 Nov 2015
  
 by Kendall Brown
 ŠKendall W. Brown
   Lesser Scaup
   Aythya affinis
 Male
 Farmington Bay
 Davis County, Utah
 13 Feb 2013
  
 by John Crawley
 ŠJohn Crawley
   Lesser Scaup
   Aythya affinis
 Male
 Farmington Bay
 Davis County, Utah
 13 Feb 2013
  
 by John Crawley
 ŠJohn Crawley
   Lesser Scaup
   Aythya affinis
 Male
 Tonaquint Nature Center
 St. George, Utah
 21 Mar 2010
  
 by Oliver Hansen
 ŠOliver Hansen
   Lesser Scaup
   Aythya affinis
 Male
 Farmington Bay
 Davis County, Utah
 24 Dec 2008
  
 by Kent Keller
 ŠKent R. Keller
  
  See "Comparison of Greater and Lesser Scaup" with photos by Brian Currie.