Distribution and Habitat
The Crested Shelduck has been collected near Vladivostok in Russia and near Fusan and Kunsan in Korea. It has been proposed that the species breeds in far-eastern Russia, northern North Korea, and northeast China and winters in southern Japan, southwest Korea, and along the east China coast as far south as Shanghai. It is believed to have a relict range, or to have been more widespread in historic times.
This species is believed to live in a wide variety of wetland and deep-water habitats at varying elevations. While all collected individuals are from the coast, especially near river mouths, recently there have been a number of reports from interior wetlands in northeastern China. It has been speculated that this species may breed in mountainous areas either away from water or on volcanic lakes.
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