. . "IUCN3.1" . . "*Tadorna casarca x Querquedula falcata?" . . . "PE" . . "The crested shelduck or Korean crested shelduck (Tadorna cristata) is a species of bird in the family Anatidae. It is critically endangered and may 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."@en . . . "*Pseudotadorna cristata" . . . "Crested shelduck"@en .