The Branta bernicla, commonly known as the brent goose, is a small species of waterfowl found primarily in the Arctic and sub-Arctic regions. These geese are characterized by their dark brown plumage, white neck patches, and distinctive black heads. They typically breed in coastal areas and migrate to temperate regions during the winter months. Brent geese primarily feed on aquatic vegetation, including seagrasses and algae. They are known for their strong migratory behavior, traveling long distances between breeding and wintering grounds. Conservation efforts are in place to protect their habitats, as they face threats from climate change and habitat loss.