The Great Egret (Ardea alba) is native to many regions across the globe. It is found in North America, Central America, South America, Europe, Africa, Asia, and Oceania, displaying a wide geographical distribution. Specifically, it can be found in countries such as the United States, Canada, Brazil, China, India, and Australia among others. The species is also present in various parts of Europe, including countries like Spain and Italy.

Great Egrets typically inhabit wetlands, which include freshwater and saltwater marshes, ponds, river edges, and estuaries. They are often found in areas rich in aquatic life, which serves as their primary food source. The environmental conditions are usually warm with ample water bodies, supporting a rich diversity of fish, amphibians, and insects. During the breeding season, they favor areas with plenty of vegetation to provide cover.

The Great Egret occupies the role of a predator in its ecosystem, primarily feeding on fish, but also on amphibians, reptiles, small mammals, and insects. It plays a crucial role in controlling the population of these species. The bird's long legs are adapted for wading in water, and its sharp beak is ideal for catching prey, showcasing its adaptation to an aquatic environment. The Great Egret's presence in various types of wetlands helps maintain the ecological balance by contributing to the regulation of prey species populations.