What is the collective noun for a group of herons?

The collective nouns for herons are: a hedge of herons, a siege of herons or a scattering of herons.

The herons are medium- to large-sized birds with long legs and necks.

The bill is generally long and harpoon-like. It can vary from extremely fine, as in the agami heron, to thick as in the grey heron. The most atypical bill is owned by the boat-billed heron, which has a broad, thick bill. The bill, as well as other bare parts of the body, is usually yellow, black, or brown, although this can vary during the breeding season. The wings are broad and long, exhibiting 10 or 11 primary feathers (the boat-billed heron has only nine),

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; they are essentially non-swimming water birds that feed on the margins of lakes, rivers, swamps, ponds, and the sea. They are predominantly found in lowland areas, although some species live in alpine areas, and the majority of species occurs in the tropics.

Their diet includes a wide variety of aquatic animals, including fish, reptiles, amphibians, crustaceans, mollusks, and aquatic insects. Individual species may be generalists or specialize in prey types, such as the yellow-crowned night heron, which specializes in crustaceans, primarily crabs.