Introduction: The Great Egret is a large and medium-sized wader. The adult Xia Yu is adult milky white; the bird is yellow; the head has a short crest; the shoulders and shoulders are formed with long scorpion feathers; the winter feathers have no feathers on the back, no head The crest is a yellowish iris. Inhabits beaches, paddy fields, lakes, mangroves and other wetlands. Feed on animal foods such as crustaceans, mollusks, aquatic insects, and small fish, frogs, crickets, and lizards. Distributed in temperate regions of the world.