

Plate 5 



4>r'f 





KlNtj-blLLtU »-iULL 



La tin <li.iaifiii''-iisis Oi'«l 



JLl 



ADULT II. SUMMER 

 GREAT BLACK-BACKED GULL 



Lurn.'i ma'inii.^i Linna<-US 

 IMMATURE ADULT IN SUMMER 



IMMATURE ADULT IN SUMMER 



GLAUCOUS GULL 



Ldru-s h;/iMr()i>rru.^ CIuuiumus 

 fND or SECOND YEAR ADULT IN SUMMER 



IMMATURE 



All 1 rwit. size 



