. A practical handbook of British birds . L. argentatus and centre of under-parts whiter)but dark markings on upper-parts rather more obscured and paler. * Brunniehs name glaucus 1764 is preoccupied by L. glaucus Pontop-pidan 1763, we must therefore adopt the name of hyperboreus Gunnerus 1767.— 766 A PRACTICAL HANDBOOK OF BRITISH BIRDS. Juvenile.—Varying somewhat in darkness of upper- andunder-parts. Head thickly streaked brown, feathers with greyish-white fringes ; back of neck and upper-mantle with distal portionsof feathers brown or pale brown with somewhat faint spots or barsof creamy-
. A practical handbook of British birds . L. argentatus and centre of under-parts whiter)but dark markings on upper-parts rather more obscured and paler. * Brunniehs name glaucus 1764 is preoccupied by L. glaucus Pontop-pidan 1763, we must therefore adopt the name of hyperboreus Gunnerus 1767.— 766 A PRACTICAL HANDBOOK OF BRITISH BIRDS. Juvenile.—Varying somewhat in darkness of upper- andunder-parts. Head thickly streaked brown, feathers with greyish-white fringes ; back of neck and upper-mantle with distal portionsof feathers brown or pale brown with somewhat faint spots or barsof creamy-buff ; rest of upper-parts more cream or whitish-buffwith irregular and wavy brown to pale brown bars and markings,subterminal bars being narrow on scapulars and broader on rumpand upper tail-coverts ; chin whitish with few streaks ; throat andsides of neck streaked brown ; upper-breast mottled (or sometimeswith barred appearance) brown or dusky-brown and dull white ;rest of breast and belly dusky-brown somewhat mottled dull white ;. A. The Glaucous Gull (Larus hyperboreus) B. The Iceland Gull (L. glaucoides). lower flanks and under tail-coverts dull white broadly barredbrown ; under wing-coverts and axillaries pale brown with whitishbases and somewhat obscure whitish bars at tips of feathers ; tailbrown with markings of dull white varying in individuals butclearer along edges and tips and at bases of feathers, more obscuredor absent towards centre and broader on outer feathers ; primariesand secondaries with outer webs and tips pale brown, tips with asmall penultimate dark brown mark and usually mottled darkerbrown, extreme tips and inner webs dull brownish-white, shaftsbrownish-straw ; primary-coverts pale brown tipped cream-buffand with penultimate dark brown mark ; greater coverts much assecondaries but rather more mottled on outer webs ; innermostsecondaries and greater coverts, median and lesser coverts asmantle but upper series of lesser more uniform pale brown. Firs
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1920
