Historically, these birds have been known as “giant” Canada geese and are the largest geese in the world. Most adults weigh between five and 14 pounds, with some weighing up to 20 pounds. Females weigh slightly less than males.
Extremely adept at living in human-altered areas, Canada geese have established breeding colonies in urban and cultivated habitats, which provide food and few natural predators. The success of this common park species has led to its often being considered a pest species because of its excrement, its depredation of crops, its noise, its aggressive territorial behavior toward both humans and other animals, and its habit of stalking and begging for food, the latter a result of humans disobeying artificial feeding policies toward wild animals.https://en.wikipedia.org/wiki/Canada_goose