362 BIRDS OF THE BRITISH ISLES. 



Common (Bull 



THE Common Gull (Larus canus^ Linnaeus) is one of our 

 resident gulls in the British Isles, but moves about a great 

 deal during the non-nesting season. It also occurs in the 

 Northern Palearctic Region. The adult in breeding dress 

 has the back, wings, and coverts, pearl-grey; secondaries, 

 broadly bordered and tipped with white ; primaries, mostly 

 black, with white spots or tips ; remainder of plumage, 

 pure white; irides, hazel; bill, yellow at tip; base, 



