The Cape Barren Goose is a very large, pale grey goose with a relatively small head. Its stubby triangular bill is almost concealed by a very prominent greenish-yellow cere (skin above the bill). It has rows of large dark spots in lines across the shoulders and wing coverts. The legs are pink to deep red and the feet are black. In flight it shows dark wingtips and along the trailing edge of the wings.
The Cape Barren Goose is found on the south-eastern coast of Australia, the southern coast of Western Australia and in south-eastern Victoria.
The average lifespan of a Cape Barren Goose is approximately 15 years of age.
The size of the Cape Barren Goose is 75 - 100 centimetres in length.
The Cape Barren Goose grazes on grasses, sedges, clovers, herbs and also some fruits.
The Cape Barren Goose is found on offshore islands, usually in areas of pasture, tussock grass or low shrub.
Breeding season is during July to September. The nest is built by the male and lined with down. Each pair establishes a territory in autumn, prepares a nest and defends it noisily and determinedly against other geese. This species is monogamous, and pair-bonds are life-long. The female Cape Barren Goose will produce 4 to 7 eggs and will incubate them for approximately 35 days.