The Crested Shelduck or Korean Crested Shelduck (Tadorna cristata) is (or was) a shelduck, a group of large goose-like birds which are part of the bird family Anatidae, which also includes the swans, geese and ducks. The Anatidae article should be referred to for an overview of this group of birds.
Very little is known about this bird, which apparently bred in Korea and eastern Russia. Only one specimen of the male has ever been collected, and is now in the Kuroda collection at Tokyo. It is now widely thought to be extinct, although occasional sightings are reported, the latest in 1985.
The fauna of the lowland regions of the Korean Peninsula is closely related to that of southern Manchuria, central China, and Japan.
Korean ginseng Panax ginseng was once common in the understory of conifer forests throughout the northern part of the Korean Peninsula and Manchuria, and perhaps in the hilly parts of this ecoregion as well.
Thus the remaining Central Korean Deciduous Forest is mostly confined to the mountains and hills that cover an extensive area of the Korean Peninsula.