Heron or Egret is a type of WADER, which is a bird that typically inhabits wetlands and feeds on small aquatic animals. These birds have long legs and long necks, allowing them to wade in shallow water and reach food sources. Herons and egrets are found in many parts of the world, including North America, Europe, Asia, and Africa. They are usually gray or white in color and can be distinguished by their size and shape. Herons are generally larger than egrets, with longer legs and necks. Egrets are smaller and have shorter legs and necks.