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The world's most endangered bird with plain appearance - Aythya baeri

（國(guó)家一級(jí)保護(hù)動(dòng)物）

(First-Grade State Protection Animal)

青頭潛鴨（學(xué)名:Aythya baeri）是雁形目鴨科潛鴨屬的鳥類。體圓，頭大，雄鳥頭和頸黑色，并具綠色光澤，眼白色。上體黑褐色，下背和兩肩雜以褐色蟲蠹狀斑，腹部白色，與胸部栗色截然分開，并向上擴(kuò)展到兩脅前面，下腹雜有褐斑;兩肋、淡栗褐色，具白色端斑。雌鳥體羽純褐色。

Aythya baeris (Order: Anseriformes, Family: Anatidae, Genus: Aythya) are round-bodied and big-headed. The male has white eyes, a black head and a neck shining with a green sheen. It is black-brown on the upper body and brown worm-like spots on the lower back and two shoulders; The white abdomen is completely different from the chestnut chest and extends upward to two front flanks, and brown spots can be found on the lower abdomen and white spots on pale chestnut brown ribs. The female only has plain brown feathers.