Animal Species:Cape Barren Goose

The Cape Barren Goose is able to drink salty or brackish water, allowing many of them to remain on offshore islands all year round.

Cape Barren Goose

Purnell Collection © Australian Museum

Standard Common Name

Cape Barren Goose

Alternative Name/s

Pig Goose

Identification

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 scapulars (shoulders) and wing coverts. The legs are pink to deep red and the feet black. In flight it shows dark wingtips and along the trailing edge of the wings.

Size range

75 cm to 100 cm

Distribution

The Cape Barren Goose is found on the south-eastern coast of Australia, the southern coast of Western Australia and in south-eastern Victoria. It is locally dispersive and has been introduced to Kangaroo Island.

Habitat

The Cape Barren Goose is found on offshore islands, usually granite, in areas of pasture, tussock grass or low heathy scrub.

Seasonality

During the summer, the non-breeding geese generally leave the islands for the mainland where they feed on improved pasture.

Feeding and Diet

The Cape Barren Goose is a grazing bird, eating predominantly the common island tussock grass, Poa poiformis, as well as spear grass and various herbs and succulents. They also eat pasture grasses, including barley and clover, and legumes.

Communication

On the ground usually quiet unless alarmed or in display. In flight more vocal, male has higher pitched, harsh trumpeted 'ark, ark-ark'.

Mating and reproduction

The Cape Barren Goose lays eggs in a nest in the tussocks of open grasslands. 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 determindly against other geese. This species is monogamous, and pair-bonds are life-long. The female incubates the eggs, and the young are brooded by both parents equally.

  • Breeding season: July to September.
  • Clutch size: Four to six.
  • Incubation: 35 days

Conservation Status

By the 1950s, numbers of the Cape Barren Goose were so low that biologists feared they may be close to extinction. Various initiatives have been taken which have increased the goose population to a level where they are no longer considered to be in danger. However they remain one of the world's rarest geese.

Conservation Status (Federal): Vulnerable
Conservation Status (NSW): Vulnerable species

What does this mean?

Classification

Species:
novaehollandiae
Genus:
Cereopsis
Family:
Anatidae
Order:
Anseriformes
Class:
Aves
Subphylum:
Vertebrata
Phylum:
Chordata
Kingdom:
Animalia

What does this mean?

References

  • Marchant, S. and Higgins, P.J. (eds.), 1990. Handbook of Australian, New Zealand and Antarctic Birds. Vol. 1. Part B. Oxford University Press: Melbourne.
  • Simpson, K and Day, N. 1999. Field guide to the birds of Australia, 6th Edition. Penguin Books, Australia.


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Tags BIBY, bird, birds, goose, geese,