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

（国家一级保护动物）

(First-Grade State Protection Animal)

青头潜鸭（学名:Aythya baeri）是雁形目鸭科潜鸭属的鸟类。体圆，头大，雄鸟头和颈黑色，并具绿色光泽，眼白色。上体黑褐色，下背和两肩杂以褐色虫蠹状斑，腹部白色，与胸部栗色截然分开，并向上扩展到两胁前面，下腹杂有褐斑;两肋、淡栗褐色，具白色端斑。雌鸟体羽纯褐色。

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.