(Vagrant along all coasts of North America). 

| Adults |   
  

  
   Black-tailed Gull
   Larus crassirostris
 Breeding
 Tokyo, Japan
 3 Oct 2005
   
 by Bryan Shirley
 ęBryan Shirley

Cropped from the photo above

   Black-tailed Gull
   Larus crassirostris
 Breeding
 Tokyo, Japan
 3 Oct 2005
   
 by Bryan Shirley
 ęBryan Shirley