Gulls 



Herring Gull 



Larus argentatus 



WW W-- 



WW--W W-- 



Thayer's Gull 



Larus thayeri 



QLL 10D; Nov. 16, 1991; 



Ft. Peck 

 n=3 



Iceland Gull 



Larus glaucoides 



LL 10; Dec. 14, 1979; Ft. Peck 

 n=2 



— w 



Glaucous Gull 



Larus hyperboreus 



LL 10; Jan., 1984; Ft. Peck 

 n=11 



W-- 



W-- 



t 



t_ 



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t 



« 



t t - - 



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47 



