Introduction: Heron, also known as the Grey Heron, is a wader of the Heron. Large waterside birds, the head, neck, feet and mouth are very long, so the body looks thin. The upper body is covered with feathers from back to tail; the tail feathers are dark gray; the shoulders have long pointed and drooping pale gray feathers, the feather ends are scattered, white or nearly white; primary flying feathers, primary covering feathers, and outer secondary flying feathers Black and gray, the inner secondary feathers are gray; the large cover feathers are light gray, the inner scorpion is gray; the middle cover feathers and the small cover feathers are light gray; the third-level flying feathers are dark gray, and also have long pointed and drooping feathers. Distributed in Africa, Eurasia, Japan, China and some countries in the Indo-China Peninsula.