Bonaparte's Gull 



Larus Philadelphia 



Mew Gull 



Larus can us 



LL 10; Oct. 26, 1977; 



Ft. Peck 

 n=1 



Ring-billed Gull 



Larus delawarensis 



SI 



wW WW-- 



WW W-- 



"-W 



--W--W 



California Gull 



Larus californicus 



SI 



-Ww-w W-- 



-w W-- 



---W 



--WW-W 



t t t t t - t 



t _t t 



t t t 



t - t t - - - - t - - 



t 



t t 

 ttttttt--t- 



t t 



t t - - - t - - 

 t I I I I I 



t 





46 



