| Breeding | Non-breeding | 1st Winter |   
  

(Found mainly along the east coast of Canada and occasionally on the east and west coasts of the US)  
  

   Black-headed Gull
   Chroicocephalus ridibundus
 Coniston Waters, Cumbria
 England
 12 July 2012
    
 by Kendall Brown
 ęKendall W. Brown

  

 Black-headed Gull
 Chroicocephalus
                  ridibundus

 South Queensferry
 Scotland
 19 July 2012

 by Kendall Brown
 ęKendall W. Brown

   Black-headed Gull
   Chroicocephalus ridibundus
 Coniston Waters, Cumbria
 England
 12 July 2012
    
 by Kendall Brown
 ęKendall W. Brown

   Black-headed Gull
   Chroicocephalus ridibundus
 South Queensferry
 Scotland
 19 July 2012
  
 by Kendall Brown
 ęKendall W. Brown