BONAPARTE GULL. 



60. Lams Philadelphia. 14 in. 



In summer bill black, feet flesh-color. Out- 

 er primary black, the others white. Young 

 birds lack the gray hood, have some mot- 

 tling on the back, a spot back of eye and 

 band across the end of the tail 



Nest. On the ground or low trees. Eggs 

 olive-brown, marked with blackish. 



Range. Breeds from southern Keewatin 

 and British Columbia northward. Winters 

 on the Atlantic, Pacific and Gulf coasts. 

 ROSS GULL. 



61. Rhodostethia rosea. 13 in. 



Adults with no dark hood but with a nar- 

 row black ring around the neck. Mantle 

 pale pearl. Under parts tinged with rosy. 

 In winter lacking the black collar and rosy 

 coloring. Tail wedge-shaped. 



Range. Polar regions south in winter to 

 VNSX northern Alaska and Greenland, The most 

 boreal of all birds and one of the rarest in 

 collections. 18 



