. A practical handbook of British birds . eathershaiing white subterminal spots or white edges ; under tail-covertsbrown-black tipped white ; axillaries and under wing-coverts aswinter but central streaks darker ; tail-feathers glossy-black withno white tips ; primaries and secondaries as winter but outer websand tips black glossed purplish, innermost secondaries with whitespot on outer webs ; primary-coverts as primaries ; wing-coverts THE GREAT NORTHERN DIVER. 467 as rest of upper-parts but not quite so glossy, greater coverts some-times with a second pair of duller white spots. Nestling.—1s
. A practical handbook of British birds . eathershaiing white subterminal spots or white edges ; under tail-covertsbrown-black tipped white ; axillaries and under wing-coverts aswinter but central streaks darker ; tail-feathers glossy-black withno white tips ; primaries and secondaries as winter but outer websand tips black glossed purplish, innermost secondaries with whitespot on outer webs ; primary-coverts as primaries ; wing-coverts THE GREAT NORTHERN DIVER. 467 as rest of upper-parts but not quite so glossy, greater coverts some-times with a second pair of duller white spots. Nestling.—1st down rather short thickly covering whole bodyand especially thick on under-parts. Upper-parts dark mouse-brown,whole chin, throat and fore-neck greyish-brown, all round breastand belly brown-grey shading to white which covers whole ofcentre of under-parts. 2nd down like 1st but decidedly paler onupper-parts. Juvenile. Male and female.—Much like adult winter but edgesof feathers of upper-parts paler grey and more prominent (feathers. The Great Northern Diver (Colymbus immer).
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1920
