Upland Goose

Identification

The upland goose, also known as the Magellan goose, is a medium-sized waterfowl displaying striking sexual dimorphism. Males are unmistakable with predominantly white heads and breast plumage contrasted by black legs, though some males display black-barred breast plumage instead. Females are quite different, featuring reddish-brown heads and breasts with yellow-orange legs, making them superficially resemble the ruddy-headed goose. Both sexes measure 60–72.5 centimetres in length. A closer look at males reveals a distinctive greenish-bronze speculum on the inner secondary flight feathers. The two subspecies differ notably in size: the larger greater Magellan goose of the Falkland Islands and the smaller lesser Magellan goose of the South American mainland.

Vocalisations provide another identification clue. Males produce a distinctive whistling "wheep" sound, while females make a lower, rattling "a-rrr" call. These geese belong to the sheldgoose group, which resemble true geese in appearance and behaviour but are more closely related to shelducks and dabbling ducks.

Range & Habitat

The upland goose inhabits the southern cone of South America and the Falkland Islands. The lesser Magellan goose subspecies ranges across southern and central Chile, Argentina, and Tierra del Fuego, with populations migrating north during austral winter towards central Argentina. The larger greater Magellan goose is endemic to the Falkland Islands and does not migrate. These geese typically occupy small, scattered groups on pasture types including temperate grasslands and arid lowland scrubs, showing a preference for areas with short green grasses. Recent land-use changes have forced them to adapt to crop fields and managed pastures.

Breeding occurs close to water sources—rivers, ponds, and coastal areas—in grasslands and coastal meadows at the beginning of the austral summer. They nest on the ground or near it among vegetation. Population estimates suggest the insular populations are stable, though continental populations have experienced recent declines in abundance.

Behaviour & Diet

Upland geese are strictly herbivorous, specialising in plant leaves, stems, and seeds. They are generally social birds, living in small, scattered groups throughout their range. A particularly unusual behaviour involves moulting: these geese shed both primary and secondary feathers in ponds or sheltered sea inlets, typically between late November and early January. Interestingly, some greater Magellan geese skip this crucial moult entirely, retaining their ability to fly throughout the austral summer—a strategy that may offer energetic advantages despite being metabolically costly.

Migratory behaviour differs between subspecies. Lesser Magellan geese migrate seasonally, with southernmost populations more likely to undertake these journeys, achieving flight speeds exceeding 40 km/h. Greater Magellan geese are non-migratory and rarely leave the Falkland Islands.

Best Time & Places to See It

The Falkland Islands offer reliable year-round sightings of the greater Magellan goose subspecies, which maintains resident populations there. For those visiting the South American mainland, central Argentina serves as the primary wintering destination for lesser Magellan geese during the austral winter months. The species breeds in southern Patagonia and Tierra del Fuego at the beginning of the austral summer, making this season ideal for observing breeding birds near water sources in grassland and coastal meadow habitats.

Look for them in areas with short green grass pastures and near freshwater or coastal wetlands. Their preference for specific habitat types means searching appropriate grassland and scrub environments increases the likelihood of successful sightings.

Photography Tips

The striking sexual dimorphism of upland geese makes them excellent photographic subjects. Capture males in profile to showcase their pure white plumage and distinctive head pattern, while females offer interesting opportunities to photograph their complex reddish-brown and barred plumage. The colour contrast between males and females is particularly striking when photographing mixed groups. Pay attention to leg colour—the black legs of males and yellow-orange legs of females provide useful identification markers.

Early morning light on grassland habitats will best illuminate their plumage details and colours. Photographing them near water during moulting season (late November to early January) may yield interesting behavioural images. The varied landscape of their habitat—from temperate grasslands to coastal meadows—offers diverse compositional opportunities to capture these geese in their natural environment.