Any of several usually white herons of the genera Bubulcus,Egretta,and related genera,characteristically having long,showy,drooping plumes during the breeding season.

• 白鹭，一种牛背鹭，大白鹭属及与其相关的鹭属的白鹭，羽毛多为白色，繁殖季节时长有美丽的下垂的长羽毛。