Herbivorous, feeding on rhizomes, aquatic and semi-aquatic plants, grasses and cultivated grains.
Average of 8 years in the wild and over 20 years in captivity.
From the age of 3 years old, mating and egg laying take place between June and July. The female incubates 4-5 eggs for 23-25 days. The fledglings’ first flight takes place 38-49 days later.
Foxes, skuas, seagulls, common raven and birds of prey among others.