Ardeidae
Herons are long-legged, long-necked, freshwater and coastal birds in the family Ardeidae, with 74 recognised species, some of which are referred to as egrets or bitterns rather than herons. Although herons resemble birds in some other families, such as the storks, ibises, spoonbills, and cranes, they differ from these in flying with their necks retracted, not outstretched. Some members of this group nest colonially in trees, while others, notably the bitterns, use reed beds. The herons are a widespread family with a cosmopolitan distribution. They exist on all continents except Antarctica and are present in most habitats except the coldest extremes of the Arctic, extremely high mountains, and the driest deserts. Almost all species are associated with water. The herons are a highly mobile family, with most species being at least partially migratory; for example, the grey heron is mostly sedentary in Britain, but mostly migratory in Scandinavia. Herons, egrets, and bitterns are carnivorous. The members of this family are mostly associated with wetlands and water and feed on a variety of live aquatic prey. Their diet includes a wide variety of aquatic animals, including fish, reptiles, amphibians, crustaceans, molluscs, and aquatic insects. Read more on Wikipedia.