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| Upland goose | |
|---|---|
| Name | Upland goose |
| Status | LC |
| Status system | IUCN3.1 |
| Genus | Chloephaga |
| Species | picta |
| Authority | (Gmelin, 1789) |
Upland goose is a conspicuous waterfowl native to southern South America, notable for pronounced sexual dimorphism and strong local cultural presence. It is widely encountered across the Patagonian steppe, the Falkland Islands, and Tierra del Fuego, and features in accounts by explorers and naturalists visiting Juan Fernández, Cape Horn, and Magellan Strait. Natural history treatments and conservation assessments by organizations including the IUCN and regional museums document its ecology and population trends.
The species was described by Johann Friedrich Gmelin in the late 18th century and assigned to the genus Chloephaga, a clade treated in comparative works alongside genera such as Anser and Branta. Historical nomenclature appears in catalogues from institutions such as the Royal Society, the British Museum, and the Museo Nacional de Historia Natural with vernacular names recorded in Spanish, English, and indigenous languages encountered by explorers like Ferdinand Magellan, James Cook, and Charles Darwin. Molecular phylogenetic studies from universities and research centers in Argentina, Chile, and the United Kingdom have explored relationships among Upland goose subspecies and allied species including kelp goose and ruddy-headed goose. Taxonomic treatments have considered geographic populations on the Falkland Islands separately, a practice reflected in regional checklists maintained by national ornithological societies and museum collections.
Adults show marked sexual dimorphism noted in field guides published by institutions such as the Royal Society for the Protection of Birds and regional birding clubs. Males typically display white plumage with bold patterns recognized by observers visiting sites like Tierra del Fuego National Park or researching in the Patagonian steppe, while females exhibit barred brown tones referenced in plates from the Natural History Museum, London and the American Museum of Natural History. Size comparisons often cite specimens in university collections at the University of Buenos Aires and the University of Cape Town for morphometric data. Vocalizations recorded by ornithologists affiliated with the Cornell Lab of Ornithology and the British Trust for Ornithology are distinct and used in field identification.
The species occupies temperate and subantarctic zones described in atlases produced by the Argentine Ornithological Association and the Chilean BirdLife partner. It breeds across southern Argentina and Chile, on the Falkland Islands, and in peripheral islands including Isla Navarino and the archipelagos near Cape Horn. Habitats include Patagonian grasslands, coastal tundra, freshwater marshes, and agricultural pastures surveyed by conservation agencies such as the World Wildlife Fund and regional park services. Migration and seasonal movements have been profiled in banding programs administered by national wildlife agencies and universities in Buenos Aires and Punta Arenas.
Social structure and flocking behaviour are documented by researchers from institutions like the Pontifical Catholic University of Chile and the National University of La Plata. The species forms family groups and larger aggregations, especially during non-breeding seasons observed by naturalists on voyages associated with expeditions such as those of HMS Beagle and later scientific cruises supported by museums. Predator-prey interactions involve native and introduced predators recorded by environmental authorities in Falkland Islands Government reports and academic studies from University of Glasgow collaborators. Responses to land-use change have been modeled in landscape ecology studies by faculties at the University of Exeter and the University of Oxford.
Feeding ecology focuses on grazing habits in grassland systems, with diets described in papers by researchers at the National Scientific and Technical Research Council (CONICET) and the Chilean National Forestry Corporation. Primary food items are graminoids and herbaceous plants common to the Patagonian steppe and coastal meadows, with seasonal use of agricultural crops recorded in reports from provincial agriculture ministries and international organizations such as the Food and Agriculture Organization. Studies in wetland ecology from the Australian National University and South American universities document occasional use of aquatic vegetation in marshes and estuaries.
Breeding biology has been studied by teams affiliated with the Falklands Conservation charity and university departments in Argentina and Chile, reporting ground nests lined with down and territories defended during the austral spring and summer. Clutch sizes, incubation periods, and fledging success are detailed in theses housed at the University of Cambridge and the University of Buenos Aires, and parental care patterns are comparable to other sheldgeese documented in comparative avian studies by the Smithsonian Institution. Juvenile dispersal and age at first breeding have been monitored via banding initiatives coordinated by national ringing schemes and international collaborators.
Global assessments by the IUCN list the species as of least concern, though regional pressures are highlighted in conservation plans produced by the Falklands Conservation, provincial governments in Santa Cruz Province and Tierra del Fuego Province, and NGOs. Threats include habitat conversion for livestock, hunting recorded in historical and contemporary reports from provincial authorities, and impacts from introduced species documented by invasive species programs at the Galápagos National Park and similar agencies. Conservation actions recommended in management plans from universities and environmental ministries include habitat protection, monitoring through national bird atlases, and community engagement supported by organizations such as the RSPB and regional conservancies.
Category:Chloephaga Category:Birds of South America Category:Birds described in 1789