Memoir 12. N. Y State Museum 



Plate 5 



4mefi!^J^^^^'^(^ 



RING-BILLED GULL 



Laru8 (ielauarrnsSs Ord 



ADULT IN SUMMER IMMATURE 



GREAT BLACK-BACKED GULL 



LiiriiK marniutt Linnaeus 



IMMATURE ADULT IN SUMMER 



HERRING GULL 



Latiuf atyentalus HrUniiich 



IMMATURE ADULT IN SUMMER 



GLAUCOUS GULL 



L<trui< (//rtHCTW BrUnnich 



END Of SECOND YEAR ADULT IN SUMMER 



IMMATURE 



All i nat. size 



