. A practical handbook of British birds . Club, xxxi, p. 69. Larus fuscus britannicus Lowe, Brit. Birds (Mag.), vi, p. 2 (1912—British Isles, type Caithness, Scotland). Larus fuscus Linnaeus, Yarrell, 111, p. 624 ; Saunders, p. 675. Description.—Adult male and female. Winter.—Crown and sidesof head white closely streaked black-brown, nape and hind-necksame but streaks widening out to blotches ; throat lightly andfinely streaked brown ; mantle, back, scapulars, and wing-covertsslate-grey (varying somewhat in shade but always darker thanL. a. cachinnans and never so dark as L. marinus), lower sc
. A practical handbook of British birds . Club, xxxi, p. 69. Larus fuscus britannicus Lowe, Brit. Birds (Mag.), vi, p. 2 (1912—British Isles, type Caithness, Scotland). Larus fuscus Linnaeus, Yarrell, 111, p. 624 ; Saunders, p. 675. Description.—Adult male and female. Winter.—Crown and sidesof head white closely streaked black-brown, nape and hind-necksame but streaks widening out to blotches ; throat lightly andfinely streaked brown ; mantle, back, scapulars, and wing-covertsslate-grey (varying somewhat in shade but always darker thanL. a. cachinnans and never so dark as L. marinus), lower scapularswith long white tips ; rump, upper tail-coverts, whole of under-pays and tail white ; primaries : 1st (undeveloped) slate-grey withmost of outer web white, 2nd (outer) brown-black with base ofinner web dull grey (much darker than Herring-Gull) extending invarying degree along inner edge towards tip, tip (40-55 mm.) whitewith black subterminal band (usually broader and with narrower 758 A PRACTICAL HANDBOOK OF BRITISH Tips of 8th primaries of juveniles of A. TheBritish Lesser Black-backed Gull (Laws ); B. The Herring-Gull (L. a. argen-tatus.) white apex than Herring-Gull, but varying and sometimes reducedto spot), inner web of tip sometimes clouded grey, 3rd as Herring-Gull but with white mirror usually smaller and often absent andgrey of inner web and base much darker, rest of primaries asHerring-Gull, but grey much darker, whitish line at junction of grey and black on inner webmore prominent, 7th with blacksubterminal band and 8thwith varying amount of black ;secondaries slate - grey withlong white tips and mottledwhite at base and edge of innerwebs ; primary-coverts and allwing - coverts slate - grey butsmall coverts along edge andbend of wing white. Thisplumage is acquired by com-plete moult June-No v. (allprimaries not finished Jan.).Summer. — The body-feathersare moulted Dec-April butnot whig or tail-feathers norwing-coverts. As winter butwh
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