Family Ducks, Geese, Swans (Anatidae)

Least Concern

Coscoroba Swan (Coscoroba coscoroba)


French: Coscoroba blanc German: Coscorobaschwan Spanish: Cisne coscoroba

Anas Coscoroba


, 1782,



A distinctive species, to some extent appearing intermediate between swans and geese, yet some authors consider it to be most closely related to whistling-ducks (Dendrocygninae). Monotypic.


S South America from Tierra del Fuego and Falkland Is N to C Chile and N Argentina; winters N to Paraguay, SE Brazil and probably in Bolivian Chaco, where recently recorded#R.

Descriptive notes

90–115 cm; male 3800–5400 g, female 3100–4500 g. The smallest swan. Black tips to six outermost primaries. Breast feathers appear centrally parted. Female... read more


Onomatopoeic “cos-cor-oo” is usually given in threat display against intruders (but is not... read more


Favours lagoons and large freshwater swamps, preferably those with well-vegetated margins, but has... read more

Food and feeding

Apparently varied diet (but no detailed studies), consisting of plant matter, small aquatic and marine invertebrates, fish spawn, etc.... read more


During local spring; May–Oct in NW Argentina, Jul–Dec in Chile, Jul–Aug in S Brazil, or May–Dec over entire... read more


Some southern breeders migrate to lower latitudes (c. 25º S) in winter, exceptionally N of the... read more

Status and conservation

Not globally threatened (Least Concern). CITES II. Still widespread and quite common locally, with an overall population estimated at < 25,000 birds in late 1990s; thought... read more

Recommended citation

Carboneras, C. & Kirwan, G.M. (2018). Coscoroba Swan (Coscoroba coscoroba). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 24 March 2018).