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(Redirected from Black-throated Diver)
Alternative name: Black-throated Diver
 Adult breeding
 Adult Non-breeding
 Similar Species
Intermediate build and bill held straight are best identifying features but very difficult to separate from Pacific Diver and may not be possible with non-breeding birds. Length 68-73cm. Wingspan 120cm.
Breeds in northern Scotland and the Hebrides, over much of Scandinavia and the Baltic States and across Russia to Sakhalin and Kamchatka, probably also northern China. Breeds in western Alaska but range unclear due to similarity of this species to the recently split Pacific Diver.
In winter ranges from the Baltic south to Biscay, the northern Adriatic and Black and Caspian Seas and a vagrant on the North African coast and the Canary Islands. In the far east winters off Japan, China and Taiwan. The Siberian race has strayed to the Pacific coast of North America. Accidental vagrant east of Pacific coast but probably often confused as Pacific Loon.
Three subspecies recognised.
sushkini is not recognised by all authorities
Breeds beside medium-large freshwater lakes, often with islands. On passage and in winter moves to coastal areas and occurs on estuaries, bays and sheltered seas.
Breeds early-May to September, begins mid-June in north of range. Nests beside water often on an island or spit, a shallow scrape or more rarely a substantial mound of vegetation built in shallow water. Eggs: 2 (1 in replacement clutch), olive-brown, sometimes more greenish with sparse black blotches (84 x 53mm). Incubated by both sexes for 28-29 days. Young tended by both sexes, feed themselves at 35 days and fly at about 60 days
Fish, also molluscs and crustaceans caught during 45-120 second dives.
Various wailing, croaking and quacking calls.
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