r....rr...... ,,f th,. N-W y..'k Sl:Ht.. Mm 



Plate 6 



SABINE'S. GULL aoult ■^' summer 



X'lria xabi-Jii {.i. Stibiiic) 

 LAUGHING GULL, adult in summer 

 Lams atricilla Ijinnucus 



KITTIWAKE 



liissfx tnilart!/la (nilachjhi (Lmn 

 ADULT [N SUMMER 

 IMMATURE 



BONAPARTE'S GULL 



Laiu.s pfuladtljiiua {<h-d) 

 ADULT IN SUMMER 

 IMMATURE 

 IVORY GULL 

 ic\i.i,} Paijophila at''a {iiKiinn-'vus) 



IMMATURE ADULT IN SUMMER 



All !; iKit. sizf 



