Barnacle goose belongs to species Branta leucopsis and are found in Greenland, Iceland, Ireland, Norway, Russia. Its diet consists of vegetation like roots, stems, leaves, and seeds. It has an incubation period of 25 days. It inhabits mountain cliffs. It has a lifespan of 24 years, and their breeding season is May to July. It weighs around 1.21–2.23 kg, with a wingspan of 130–145 cm and length of 55–70 cm. Its sexual maturity is at 3 years. And it is a migratory bird.