The gray goose is a species of the genus field geese in the duckbill family. Greylag geese are among the most common waterbirds and are, after the Canada goose, the second largest goose species in Europe. They are the wild ancestors of domesticated domestic geese. Wikipedia
Scientific name: Anser anser
Weight: 3.3 kg (Large adult animal) Encyclopedia of Life
Length: 76 - 89 cm Encyclopedia of Life
Family: duck birds (Anatidae)