Ali considered Raj-hamsa as the bar-headed and Kadamb as the greylag goose. Examples include mallards, wigeon, Greylag geese, herons and coots. The greylag was once revered across Eurasia. The largest is the greylag goose at . The Sebastopol is a breed of domestic goose, descended from the European Greylag goose. Greylag geese are gregarious birds and form flocks. Meanwhile, Ugly comes across two military geese, Greylag and Dot, and begs for their help. During the migratory season, the region is visited by greylag and black geese. Lorenz studied instinctive behavior in animals, especially in greylag geese and jackdaws. Greylag geese are largely herbivorous and feed chiefly on grasses. The greylag goose has become an invasive species in several areas. Most domestic geese are descended from the greylag goose ("Anser anser"). Greylag geese tend to pair bond in long-term monogamous relationships. Others originate in Northern Europe, such as the greylag goose ("Anser anser"). "Anser anser", the greylag goose, is a member of the waterfowl family Anatidae.