366 



BIRDS OF THE BRITISH ISLES. 



coral-red, and with a dark band in front of the angle; legs, 

 brownish. Length, about seventeen inches. The adult in 

 winter has the head streaked with dark brown. 



Bonaparte'6 (BiUL 



Bonaparte's Gull {Lams Philadelphia^ Ord) is an ex- 

 tremely rare straggling winter and spring migrant to the 

 British Islands, and is found inhabiting the Northern 

 Nearctic Region. The adult in summer has the mantle 

 pearl-grey ; hood, greyish-black ; primary coverts, white ; 

 primaries, tipped with white ; plumage otherwise similar 

 to Lams ridibuiidus ; bill, black. Length, about fourteen 

 inches. The adult in winter is said to have the head nearly 

 white. 



