The Greylag Goose (Anser anser) is native to Europe and Asia. Its geographical distribution spans from Iceland, Scotland, Scandinavia, and the Baltics in the west, extending across northern and eastern Europe, reaching as far as parts of Siberia and northern China.

Greylag Geese are typically found in a variety of wetland habitats such as marshes, lakes, and rivers. They prefer lowland areas and can also be found in farmland environments, particularly during the winter months. These habitats generally offer a temperate climate with access to open water and abundant vegetation.

The Greylag Goose occupies a niche as a herbivore in its ecosystem, feeding predominantly on grasses, aquatic plants, and grains. In agricultural areas, they may also consume crops. They play a crucial role in seed dispersal and nutrient cycling within their habitats.