Introduction
The Ruddy-headed Goose (Chloephaga rubidiceps) is a small South American sheldgoose in the family Anatidae. It occurs in southern Patagonia and the Falkland Islands, with two geographically and genetically distinct populations: a sedentary island population and a migratory continental population. The species is globally assessed as Least Concern, although the continental population is highly threatened and has declined substantially. (worldbirdnames.com)
Physical Description
The Ruddy-headed Goose is approximately 45–50 centimetres long. Adults have a cinnamon to reddish-brown head and upper neck, a grey-brown body with fine barring, and darker wings and tail. The underparts are paler, with warm buff or cinnamon tones, and the legs are pinkish. The bill is relatively short and dark.
Males and females have broadly similar plumage, so sex is difficult to determine by appearance alone. Its compact size, reddish head and neck, and finely barred body are useful field characters. Detailed information on juvenile plumage and age-related variation is limited in the sources consulted. (rewildingchile.org)
Range and Habitat
The species is native to southern South America. The continental population breeds in southern Chile and Argentina, including the Magallanes region, Tierra del Fuego and adjacent parts of southern Patagonia. It migrates northwards after breeding, with wintering areas extending into central Argentina, including southern Buenos Aires Province. Some birds travel more than 1,800 kilometres between breeding and wintering areas.
A separate, sedentary population occurs in the Falkland Islands, where the species is a resident breeder and makes local movements. Research indicates that the island and continental populations are genetically distinct and should be treated as important separate conservation units, even though they are currently recognised as one species.
Ruddy-headed Geese use open Patagonian steppe, grasslands and wetlands, particularly areas near rivers, lagoons, ponds, marshes and estuaries. Breeding sites are generally associated with low vegetation and access to water. (cambridge.org)
Behaviour and Diet
Ruddy-headed Geese are mainly terrestrial foragers and feed largely on vegetation. Their diet includes grasses, sedges, leaves, stems, roots, seeds and other plant material. They may also feed in agricultural areas, where wintering birds can use harvested fields and young crops. The species usually forages on the ground rather than feeding extensively in open water.
Outside the breeding season, birds may gather in small flocks or mixed groups with other sheldgeese. The continental population is migratory, whereas the Falkland Islands population is largely sedentary. Continental birds return to southern Patagonia for breeding and migrate north after the breeding season.
Breeding takes place during the austral spring and summer. Pairs nest on the ground, usually in grassland or near wetlands, and the nest is lined with vegetation and down. Clutch size is variable, generally ranging from three to eight eggs. Incubation lasts about 30 days, and the down-covered young are precocial, leaving the nest soon after hatching while remaining under parental care. (en.wikipedia.org)
Identification Tips
Look for the following combination of features:
- A small, compact sheldgoose with a cinnamon or ruddy-brown head and upper neck.
- Finely barred grey-brown body plumage.
- Pinkish legs and a dark bill.
- A mainly terrestrial feeding style in grassland, steppe and wetland margins.
- Smaller size than the Upland Goose, with a distinctly reddish rather than dark head.
The species can be confused with other Patagonian sheldgeese, especially the female Upland Goose. The Ruddy-headed Goose is smaller and has a warmer reddish head and neck. Ashy-headed Geese have a greyer head and different overall colouration. Care is needed when identifying birds in mixed flocks, particularly in wintering areas where several sheldgoose species may occur together. (rewildingchile.org)
Conservation Status
The Ruddy-headed Goose is currently assessed globally as Least Concern by the IUCN, but this broad assessment includes the much larger Falkland Islands population. The continental population in Chile and Argentina is considerably more vulnerable and has been described as endangered or critically endangered in regional assessments and scientific studies.
The main threats to the continental population include historical and ongoing hunting pressure, persecution when birds mix with other geese regarded as agricultural pests, habitat loss and degradation, disturbance at breeding sites, and predation by introduced or free-ranging mammals. Introduced grey foxes and American mink, along with domestic dogs and cats, may affect nests and young birds in parts of the range. Agricultural development, livestock activity, urbanisation, recreation and other land-use changes can reduce the availability of safe breeding and feeding habitat.
Conservation measures include legal protection, hunting controls, monitoring of breeding and wintering areas, habitat restoration, public education and international cooperation between Argentina and Chile under the Convention on Migratory Species. Conservation programmes also focus on protecting key sites in the Magallanes region and reducing disturbance and persecution along the migration route. (ruddy-headed-goose.cms.int)
Frequently Asked Questions
Where does the Ruddy-headed Goose live?
It occurs in southern Chile and Argentina, including Patagonia and Tierra del Fuego, and in the Falkland Islands. The continental population migrates north to wintering areas in central Argentina, while the Falkland Islands population is mainly sedentary. (ruddy-headed-goose.cms.int)
Is the Ruddy-headed Goose endangered?
The species is assessed globally as Least Concern, but the migratory continental population is seriously threatened and has endangered or critically endangered regional assessments. Its conservation status therefore depends on whether the global species or the continental population is being considered. (sib.gob.ar)
What does the Ruddy-headed Goose eat?
It is primarily herbivorous. Its diet includes grasses, sedges, leaves, stems, roots and seeds, supplemented in some seasons by food from agricultural fields. (en.wikipedia.org)
How can the Ruddy-headed Goose be identified?
The most useful field marks are its small size, cinnamon or reddish-brown head and upper neck, finely barred grey-brown body, pinkish legs and terrestrial feeding habits. It is smaller and more reddish-headed than the Upland Goose. (rewildingchile.org)
Does the Ruddy-headed Goose migrate?
The continental population migrates between breeding grounds in southern Patagonia and wintering grounds in central Argentina. The Falkland Islands population is generally resident, although it makes local movements. (cambridge.org)
What is being done to protect the species?
Protection measures include hunting restrictions, habitat conservation, population monitoring, restoration of breeding sites, public education and coordinated conservation work between Argentina and Chile. Key breeding areas in Chile’s Magallanes region are receiving additional monitoring and restoration attention. (ruddy-headed-goose.cms.int)
References
- Cossa, N. A., Fasola, L., Roesler, I. and Reboreda, J. C. 2017. Ruddy-headed Goose Chloephaga rubidiceps: former plague and present protected species on the edge of extinction. Bird Conservation International, 27, 269–281. https://doi.org/10.1017/S0959270916000101. Cambridge Core, accessed 8 September 2026.
- Cossa, N. A., Lessa, E. P., Lessa, E. P., Fasola, L., Roesler, I. and Reboreda, J. C. 2012. Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta. Bird Conservation International, 22. Cambridge Core, accessed 8 September 2026.
- Convention on Migratory Species. 2006. Memorandum of Understanding between the Argentine Republic and the Republic of Chile concerning Conservation Measures for the Ruddy-headed Goose (Chloephaga rubidiceps). CMS Secretariat. CMS Ruddy-headed Goose MOU, accessed 8 September 2026.
- International Union for Conservation of Nature. n.d. Chloephaga rubidiceps, IUCN Red List of Threatened Species. IUCN Red List, accessed 8 September 2026.
- IOC World Bird List. 2026. Ruddy-headed Goose, Chloephaga rubidiceps. IOC World Bird List, version 15.2. World Bird Names, accessed 8 September 2026.
- Sistema de Información de Biodiversidad, Administración de Parques Nacionales, Argentina. n.d. Chloephaga rubidiceps, Cauquén Colorado. SIB Argentina, accessed 8 September 2026.
- Rewilding Chile. 2025. Ruddy-headed Goose. Rewilding Chile. Species conservation project, accessed 8 September 2026.
- Chilean Ministry of the Environment. 2026. Plan de protección del canquén colorado completa dos años de monitoreo y educación ambiental en Magallanes. Ministerio del Medio Ambiente, accessed 8 September 2026.
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