Great Egrets usually stay in habitats that have areas of either saltwater or freshwater nearby. They are seen near marshes, ditches, canals, ponds, tidal flats, rivers, streams, swamps, lakes, estuaries (or water passages where the ocean tide meets a river current), and flooded farm fields. Great Egrets are usually solitary birds when not nesting. But they also can gather together from surrounding areas to form a place where a large group can rest or sleep, called a communal roost. Frequently, several pairs build nests in the same tree and form a colony; but occasionally a pair may nest alone. Great Egrets often share colonial nesting sites, or rookeries, with other egret species, herons, and other wading birds as well.
They build their nests in trees, thickets, or shrubs 10-90 feet above water or ground. Nesting colonies are usually located in extremely tall trees. Great Egrets build large platform-style nests using sticks and line the nests with plant material. Both parents help to build the nest, incubate (to sit on and keep the eggs warm) the eggs, and feed their young. The young will be able to fly in 6-7 weeks after hatching.
Within the colony, Great Egrets are territorial and aggressive, defending their space with sharp bill jabs and harsh calls.
The great egret is generally a very successful species with a large and expanding range, occurring worldwide in temperate and tropical habitats. It is ubiquitous across the Sun Belt of the United States and in the Neotropics. In the Nordic countries, it was historically a rare visitor.
They primarily feed on aquatic animals like fish, frogs, and crustaceans. Small mammals, birds, and insects are also part of their diet. Great Egrets hunt by wading in shallow water, using their sharp bills to catch prey. Their diet varies depending on the season and location, adapting to available food sources.
Nests are made of sticks and twigs; the nests are large — up to a yard across and a foot deep. They are often built in trees above water. A clutch has up to 6 eggs, which are incubated for 23–27 days; after hatching the young stay at the nest for 21–25 days. Great egrets can live to be at least 22 years old.
Great Egrets are usually solitary birds when not nesting. But they also can gather together from surrounding areas to form a place where a large group can rest or sleep, called a communal roost. Frequently, several pairs build nests in the same tree and form a colony; but occasionally a pair may nest alone.
