BIRDS OF XEAV YORK 



Memoir 12. N. Y. State Museum 



Plate 5 



RING-BILLED GULL 

 Laru8 dtla 



ADULT IN SUMMER 



GREAT BLACK-BACKED GULL 



Larus marinus Linnaeus 



IMMATURE ADULT IN SUMMER 



TZSl^tized by Micmsa.J:: 



HERRING GULL 



Luriis aruentatus Brtlnnich 



ADULT IN SUMMER 



GLAUCOUS GULL 



Larus glaucus Briinnich 



END OF SECOND VEAR ADULT IN SUMMER 



IMMATURE 



All 1/7 nat. size 



