Facts about this animal
A small swan with a body-weight of about 4.6 kg in males and 3.8 kg in females, and a total length of 87.5-112.5 cm. The plumage is entirely white.
The female lays 4 to 7 creamy-white eggs, in a bulky ground nest near water, lined with much down for a swan. The eggs are incubated for 35-40 days exclusively by the female.
. The food of coscoroba swans includes various plants, aquatic insects, fish spawn and at times small crustaceans.
|Name (Scientific)||Coscoroba coscoroba|
|Name (English)||Coscoroba swan|
|Name (French)||Cygne coscoroba|
|Name (Spanish)||Cisne coscoroba|
|Local names||Brasil: Coscoroba, Apororoca|
|CITES Status||Appendix II|
|CMS Status||Appendix II (as Anatidae spp.)|
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|Range||Southern cone of South America: Argentina, Brazil, Chile, Falkland Islands, Paraguay, South Georgia and the South Sandwich Islands, Uruguay|
|Habitat||Freshwater wetlands, including bogs, marshes, swamps, fens, peatlands, ponds, dams and lakes.|
|Wild population||The global population is estimated to be 10,000-25,000 individuals by Wetlands International (2002).|
|Zoo population||199 reported to ISIS (2006).|
In the Zoo
How this animal should be transported
For air transport, Container Note 17 of the IATA Live Animals Regulations should be followed.
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Why do zoos keep this animal
The coscoroba swan is not a threatened species but it os of educational interest because it is a taxonomic conundrum. It is swanlike overall, but its honking voice and gooselike head make it somewhat indistinguishable. Its bill looks like a duck and it is the only swan with offspring that look like tree ducks. Some scientists, who believe it to be a member of the swans, think there is a link either between swans and true geese, or between swans and whistling ducks.
Coscorobas display typical swanlike threats that involve lifting their folded wings to make them appear larger. Aggressive wing flapping is also a typical threat. Unlike typical swans, coscorobas are not known to have a triumph ceremony. Such ceremonies are when a male attacks a rival suitor, then returns to his potential mate to perform an elaborate ceremony while posturing and calling.