The Crested Shelduck or Korean Crested Shelduck, Tadorna cristata, is a species of bird in the family Anatidae. It is critically endangered and believed by some to be extinct. The male Crested Shelduck has a greenish-black crown, breast, primaries, and tail, while the rest of its face, chin, and throat are brownish black. The male's belly, undertail coverts, and flanks are a dark grey with black striations. The upper wing coverts are white, while its speculum is an iridescent green.
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