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Cape Barren Goose Fact File

Appearance

The cape barren goose is a large blue-grey bird. On the crown of the head the feathers are white. They have darker wingtips and a darker trailing edge of their wing. The short bill is black and covered by a large yellow cere.

Their legs are a deep pink color with black feet. On the feet there is reduced webbing which is an adaptation to spending most of their time on land.

Females are slightly smaller than males. Their body measures 75-90cm (29.5-35.4in) long with a wingspan of 1.7m (5.5ft) across. An average weight for the cape barren goose is 4-6kg (8.75-13lbs).

Diet

The cape barren goose is a herbivore. They feed on grasses, herbs, succulents, legumes and other vegetation.

Large amounts of salt are taken in with their food. This is excreted through a nasal gland. They are able to drink salty and brackish water meaning they can remain on islands year round.

Cape Barren Goose
Cape Barren Goose

Scientific Name

Cereopsis novaehollandiae

Conservation Status

Least Concern

Weight

4-6kg (8.75-13lbs)

Length

75-90cm (29.5-35.4in)

Wingspan

1.7m (5.5ft)

Lifespan

15 years

Diet

Herbivorous

Range

Australia is the native home of the cape barren goose. Here they can be found throughout Western Australia, South Australia, Victoria and Tasmania. They can also be found on a number of offshore islands.

An introduced population of the cape barren goose has been established in New Zealand. In Australia they have been introduced to Kangaroo Island where they did not naturally occur.

Habitat

They make their home in coastal areas of Australia. These habitats may include shrubland, grassland and wetlands.

Cape barren goose are almost always found near water such as the sea, dams, swamps, lakes and lagoons.

Cape Barren Goose

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Reproduction

Cape barren geese breed from May to September. Pairs remain together for life. Throughout breeding season they are highly aggressive and will chase off anything which threatens them.

The male will form a nest out of grasses and plant matter which is then lined with soft feathers.

In to this nest the female will deposit between four and seven creamy white eggs.

These eggs are incubated for six weeks after which they hatch. They are incubated by the female while both parents help brood the eggs. At hatching the chicks are covered by downy feathers which are striped with white and brown.

The chicks will follow their parents and feed on grasses.

Behavior

During summer many of these birds move from islands to the mainland.

In flight a cape barren goose will make a loud ‘ark-ark-ark’ call.

Pairs remain together year round. In parts of their range these pairs will form large flocks during summer. These flocks may number up to 300 members.

Cape Barren Goose

Predators and Threats

If threatened they make take to the water and swim which affords them some protection.

They will attempt to scare predators away by running towards them with their wings outstretched. These birds will also strike with their wings or bite.

By the 1950s humans had almost hunted the cape barren goose to extinction. Protection measures were put in place and their feeding areas were restored to help increase their population. Despite this rebound in their population they remain one of the world’s rarest geese.

Humans continue to affect their population through vehicle strikes.

Quick facts

Cape barren geese were originally believed to be the immature form of the black swan.

They are also known as the pig goose.

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Photo Credits

Top 2

By JJ Harrison (https://www.jjharrison.com.au/) - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=4330626

Middle

By Ltshears - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7410501

Bottom

Under License

References

Burnie, D., 2011. Animal. 3rd ed. London: DK

Australian Reptile Park - Wildlife Park Sydney & Animal Encounters Australia. 2020. Cape Barren Goose Habitat, Diet & Reproduction - NSW. [online] Available at: <https://reptilepark.com.au/animals/birds/cape-barren-goose/> [Accessed 4 October 2020].

BirdLife International. 2018. Cereopsis novaehollandiae. The IUCN Red List of Threatened Species 2018: e.T22679958A131910442. https://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T22679958A131910442.en. Downloaded on 04 October 2020.

The Australian Museum. 2020. Cape Barren Goose. [online] Available at: <https://australian.museum/learn/animals/birds/cape-barren-goose/> [Accessed 4 October 2020].

Birdlife.org.au. 2020. Cape Barren Goose | Birdlife Australia. [online] Available at: <https://birdlife.org.au/bird-profile/cape-barren-goose> [Accessed 4 October 2020].

Birdssa.asn.au. 2020. Cape Barren Goose - Birds SA. [online] Available at: <https://birdssa.asn.au/birddirectory/cape-barren-goose/> [Accessed 4 October 2020].

Seaworld.org. 2020. Cape Barren Goose Facts And Information | Seaworld Parks & Entertainment. [online] Available at: <https://seaworld.org/animals/facts/birds/cape-barren-goose/> [Accessed 4 October 2020].

Jones, R., 2020. Cape Barren Goose - Australian Bush Birds. [online] Australianbushbirds.info. Available at: <http://www.australianbushbirds.info/infc/cereopsis_novaehollandiae.html> [Accessed 4 October 2020].

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