i88 
Allen’s naturalist’s library. 
on the lower back, rump, and upper tail-coverts, which are 
almost uniform j the back of the neck plentifully streaked 
with white and black, the green gloss on the latter 'being very 
distinct ; wing-coverts brown, rather more distinctly edged 
and spotted with white; quills and tail blackish; crown of 
head and neck grey, obscurely mottled with dusky stripes on 
the former; the nape and hind-neck very distinctly streaked 
with black and white ; sides of face, throat, and sides of neck 
clear slaty-grey, with a long triangular patch of vinous chestnut 
reaching from the lower throat to the fore-neck ; remainder 
of under surface of body white ; the upper fore-neck and sides 
of chest streaked with black; sides of the body blackish, 
slightly spotted with white ; the lower flanks and thighs sooty 
brown ; under tail-coverts sooty-brown with white tips ; under 
wmg-coverts and axillaries white, the latter with dark shaft 
markings ; bill black ; legs and feet greenish black ; iris 
hazel. Total length, 23-5 inches; culmen, 2-1; wing, lo'o ; 
tail, 1-8; tarsus, 2-65. “ 
AdiUt Female.— Similar in plumage to the male. Total length, 
21-5 inches; wing, lo’S. 
Winter Plumage.— Slaty-grey above, profusely speckled with 
white in the form of twin spots on the feathers, which 
are much smaller on the mantle, lower back, rump, and 
upper tail-coverts; the head and neck greyer and thickly 
streaked with narrow lines of dull white ; lores, sides of fac^ 
and under suiface of body white, mottled with black centres 
to the feathers on the sides of the fore-neck and chest ; the 
sides of the body and flanks slaty-black, mottled and edged 
with white ; under wing-coverts and axillaries white, with 
dusky brown centres along the latter; the lower primary 
coverts externally ashy. 
Young Birds in Winter Plumage. — May generally be distinguished 
by a few dusky freckled edges to the feathers of the lower 
throat and sides of neck. 
Nestling.— Covered with sooty-brown down, paler on the 
under-surface, which becomes white as the bird grows older. 
Cnaracters. — The very different summer plumage distinguishes 
the Red-throated from the Blue-throated Diver in the breeding 
