The banks of Barden Lake are heavily grazed by Canada and Greylag Geese. Canada and Greylag Geese are both introduced species, which have escaped into the wild and have now become common in the countryside.

Unfortunately they eat large amounts of vegetation and this can lead to soil erosion. Many other birds live in and around the lake including waterfowl like Greylag Geese, Mallard Ducks, Swans, Great Crested Grebe, Canada Goose, Coots, and Moorhens.

A large goose, with a distinctive black head and neck and large white throat patch. An introduced species from N America, it has successfully spread to cover most of the UK. It forms noisy flocks and is often regarded as a nuisance in areas where large numbers occur on amenity grassland and parks.

Canada Geese are herbivores although they sometimes eat small insects and fish. Their diet includes green vegetation and grains. The Canada Goose eats a variety of grasses when on land. It feeds by grasping a blade of grass with the bill, then tearing it with a jerk of the head. The Canada Goose also eats grains such as wheat, beans, rice, and corn when they are available. In the water, it feeds from silt at the bottom of the body of water. It also feeds on aquatic plants, such as seaweeds.