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A PRACTICAL HANDBOOK OF BRITISH BIRDS. 



but large majority are much less streaked) ; mantle, back, scapulars 

 and wing-coverts as in L. a. argentatus but on the whole slightly 

 darker though many individuals cannot be distinguished ; primaries 

 as in L. a. argentatus but grey of inner webs usually paler and often 



Two outer primaries of adults of— A. The Yellow-legged Herring-Gull (Laws argentatus 

 cachinnans). B. The Herring-Gull (L. a. argentatus). C. The British Lesser Black- 

 backed Gull (L. fuscus affinis). 



extending further towards tips, on outer two primaries often white 

 or whitish, white tip of 2nd usually longer (50-65 mm.) and sub- 

 terminal band more often broken, 3rd seldom without mirror which 

 is usually larger than in L. a. argentatus. This plumage is acquired 

 by complete moult May-Oct. Summer. — The body-feathers are 



