Kelp Goose

Identification

The kelp goose is a medium-sized waterfowl measuring 55 to 65 cm in length, with strikingly different plumage between the sexes. Adult males are entirely white except for a black bill with a distinctive pink spot on the maxilla, and yellow legs and feet. Adult females present a completely different appearance: they display a pale brown crown, chocolate brown head, neck, and mantle, with black and white barring on the breast and flanks, while their back, tail, and undertail coverts are white. Females also have pink bills and yellow legs and feet. Juvenile males resemble adult females but with brown "shoulders" and greenish-yellow legs, while juvenile females are distinguished by a dark crown and dark uppertail coverts.

Two subspecies exist: the nominate C. h. hybrida found on mainland South America, and the heavier C. h. malvinarum endemic to the Falkland Islands. While they share identical plumage patterns, the Falklands subspecies is noticeably larger, with males weighing up to 3.6 kg compared to the mainland subspecies' maximum of 2.58 kg.

Range & Habitat

The kelp goose is endemic to southern South America and the Falkland Islands. The nominate subspecies inhabits coastal southern Chile and Argentina, including the Tierra del Fuego archipelago, while C. h. malvinarum is found exclusively on the Falkland Islands. Except during the breeding season, these geese favour rocky coasts and shingle beaches where kelp beds grow offshore. For nesting, they move to coastal freshwater lakes, building their grass nests lined with down in vegetation or beside boulders and driftwood.

Behaviour & Diet

The kelp goose is predominantly sedentary, though some movement occurs seasonally. The mainland subspecies remains year-round along the southern Chilean coast and in Tierra del Fuego, with some individuals migrating further north during the austral winter. The Falklands population similarly stays resident, with occasional movements from exposed offshore islands to larger islands during winter months.

Kelp geese are almost entirely vegetarian, feeding primarily by grazing on coastal seaweeds and algae, though they occasionally dip underwater to feed. During breeding season they graze on grass, and in winter they may consume berries. The species is highly vocal, with males producing a whistled "si-si-si" call and females making low honking "arnk-arnk" or "ooer" sounds. Breeding occurs from October to January on the mainland and extends only to November on the Falklands. Pairs or loose groups nest together, laying clutches of three to seven eggs with an incubation period of about 30 days. Chicks fledge 12 to 13 weeks after hatching, with both parents providing care through winter.

Best Time & Places to See It

The kelp goose is year-round resident throughout its range, making it accessible to visitors any season, though breeding activity peaks from October through January on the mainland and September through November on the Falklands. Look for them along rocky coasts and shingle beaches where kelp beds are visible offshore. During summer, non-breeding flocks of 100 or more individuals may congregate on the shore, offering excellent viewing opportunities. The Falkland Islands population is particularly accessible to travellers visiting that region.

Photography Tips

The stark sexual dimorphism of kelp geese makes them rewarding photography subjects. Male's pure white plumage creates dramatic contrast against dark rocks and coastal vegetation, while females' intricate brown and barred patterns reward close-up work. Coastal habitats with kelp beds and rocky shorelines provide natural compositional elements. Early morning light along southern coastlines will enhance the contrast in male plumage. The birds' sedentary nature and tendency to gather in groups allows for patient approach and composition. Winter gatherings on larger Falkland Islands locations may provide opportunities to photograph both subspecies' size differences.