Allen’s naturalist’s lidrary. 
1 86 
throat equally streaked with black and white, the black streaks 
very broad and extending to the sides of the neck ; remainder 
of under surface of body from the fore-neck downwards pure 
white ; the sides of the fore-neck and chest narrowly streaked 
with black and^ white ; sides of the body glossy-black, the 
longer under tail-coverts black with white tips ; under wing- 
coverts and axillaries white, the outer lower primary-coverts 
externally ashy j bills black ; feet blackish ; iris crimson. 
Total length, 22-0 inches; culmen, 2-2; wing, irS; tail, 2'i' 
tarsus, 2-9. 
_ Adult Female.— Similar to the male. Total length, aro 
inches; wing, ri'5. 
Winter Plumage,— Similar to that of the Great Northern 
Diver, but distinguished by the much smaller bill. 
Eange in Great Britain. — The Black-throated Diver breeds in 
the north of Scotland and in the Orkneys, but is not known 
from the Shetlands. It nests not uncommonly in Siitherland- 
shire and Caithness, and breeds also in the lochs of Inverness- 
shire, Perthshire, Ross, and Argyll, as well as in many of the 
Outer Hebrides (cf. Saunders’ Manual, p. 698). In winter 
it visits all the coasts of the British Islands, but is rarer 
than the other species of Diver, and mostly young birds are 
procured. 
Eange outside the British Islands. — The present species has a 
circumpolar distribution during the breeding season, nesting 
in the ^ northern areas of both hemispheres, and migrating 
south in winter to the inland waters of Europe and the 
Mediterranean and in the east to Japan. At the last-named 
season it also extends its range to the Northern United 
States. It is not as yet known to occur in Greenland or 
Iceland. 
Habits.- During the breeding season the Black- throated 
Diver frequents lochs and inland waters. In Norway it is by 
no means uncommon on the lakes of the higher fjelds, but 
the bird is not much in evidence during the day-time, though 
in the very early morning they were seen at Alfheim (1896) 
close to the house, swimming about in the lake, and making 
a considerable cackling. In the evening, as the days began 
