. A practical handbook of British birds . ometimes tinged rufous),innermost black-brown ; wing-coverts grey-brown except inner-most which are black-brown and upper series of lesser which arewhite and often tinged rufous on inner feathers. This plumage is THE RED-NECKED GREBE. 457 acquired by complete moult of body, tail, innermost secondariesand innermost greater coverts but not rest of wing Dec. to Mayand often summer feathers still growing June. Winter.—Fore-head, crown (no tufts) and back of neck dark grey-brown ; rest ofupper-parts darker brown (but paler than summer) and feathersedged bro
. A practical handbook of British birds . ometimes tinged rufous),innermost black-brown ; wing-coverts grey-brown except inner-most which are black-brown and upper series of lesser which arewhite and often tinged rufous on inner feathers. This plumage is THE RED-NECKED GREBE. 457 acquired by complete moult of body, tail, innermost secondariesand innermost greater coverts but not rest of wing Dec. to Mayand often summer feathers still growing June. Winter.—Fore-head, crown (no tufts) and back of neck dark grey-brown ; rest ofupper-parts darker brown (but paler than summer) and feathersedged brown-grey ; under and behind eye finely mottled grey-brown ; rest of sides of head, chin and upper-throat white ; lower-throat and sides of neck brown, feathers lightly tipped whitish ;rest of under-parts silky-white, feathers on sides of body with somesmall subterminal black-brown dots and marks, those of flankswith larger spots or tips of black-brown (considerably less markedthan in summer); wings as in summer but innermost secondaries. The Red-necked Grebe (Podiceps g. griseigena). Adult, winter. and greater coverts not quite so black. This plumage is acquiredby complete moult probably as in P. cristatus but autumn moultingmaterial is insufficient to make a definite statement possible. Nestling.—Head and neck striped as in Great Crested Grebebut black on each side of crown wider and white patch in centre ofback of crown reduced to a stripe ; light stripes on neck dull huffishand those down centre of back of neck narrowed and obscured byblack and those on upper-mantle very narrow and scarcely notice-able ; rest of upper-parts, base of throat, sides of body, flanks andvent brown-black unstriped ; centre of breast and belly white ;black stripes down sides of neck broken about middle and twostripes down sides of lower-throat joining and forming V (notinverted as in Great Crested Grebe). Juvenile.—Resembles adult summer but upper-parts withslightly more brownish tinge ; sides
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1920
