Nest, &c. 
Food. 
412 NATATORES. . COLYMBUS. Diver. 
female, but the supposed black one unfortunately escaped. 
A minute examination, notwithstanding, of the old and young 
of both species, can scarcely fail to convince any unpre- 
judiced person of there being ground for a real specific dis- 
tinction, as the difference in the form of their bills, their 
relative size, and the disposition of their colours, are well 
marked and sufficiently obvious. ‘That both sexes of the 
present species possess the black mark upon the throat, I 
have had convincing proof, by the dissection of one of these 
birds in the matured plumage, that was killed upon the 
Tweed, and which was a female ; and I may also add, that 
Red-throated Divers of both sexes are frequently taken. 
Like the others, it is a native of the Arctic Regions of both 
the new and ancient world, and during the summer is found 
in very high latitudes; Dr Ricuarpson says that it is com- 
mon in Hudson’s Bay, but is rarely seen upon the lakes in 
the interior. Its equatorial or winter migration in Europe 
extends as far as Switzerland, where it is sometimes seen upon 
the larger lakes.—It breeds upon the brink of the water, and, 
like the Northern Diver, lays but two eggs, which are stated 
to be of a yellowish-brown, or isabella colour, blotched with 
black. It dives with the same ease, and as perseveringly as 
the other species, and can remain long submerged, making 
very great progress during its submarine flight, as was ex~ 
perienced by Sir Wittram Jarpine and myself, when in 
chace of this bird in a light and handy boat upon Loch Awe. 
Our utmost exertion could never bring us within range, and 
we were often foiled by its returning on its former track, and 
re-appearing in a direction contrary to that in which it seemed 
to have dived.’ During this pursuit it was frequently lost 
for several minutes together, and came up nearly a quarter 
of a mile a-head, and its progress could not, I should think, 
have been much under the rate of eight miles in the hour.— 
The Black-throated Diver lives upon fish, aquatic insects, 
and such other food as it procures under water. Its skin is 
highly prized by the Eskimaux and Indians for its warmth 
