Magellanic Plover, Pluvianellus socialis is the sole member of family Pluvianellidae, and despite its name it is not really related to true Plovers, Charadriidae, but closer to Chionidae, the Sheathbills. However, it wasn’t until 1975 that it was separated from Plovers and placed into its own monotypic family, Pluvianellidae and genus, Pluvianellus.
Some authors have suggested placing it within the Sheathbill family, but several morphological and behavioural traits separate it from that group, such as the use of a crop to carry food to the chicks, the slight asymmetry of the bill, and the use of the feet to dig in the ground for food.
A medium-sized shorebird, the shape of its body recalls a small dove or seedsnipe more than a plover. Generally found along the shores of shallow saline lakes and lagoons with rocky and muddy shores, very exposed to the wind, with variable water levels. Also on rocky coasts, especially during migration periods.
It can be easily overlooked due to its extremely cryptic colouration, especially as it blends with the pebbles that are commonly part of their habitat, and finding it usually involves a fair amount of time and patience, trying to discern its minute shape among vast extensions of pebbles and stones in the shores of Patagonian water bodies.
Territorial, normally in pairs or family groups. Also associates with other plovers and sandpipers, like Two-banded Plover, Rufous-chested Dotterel and Baird’s and White-rumped Sandpipers. Forms flocks during migration and winter.
Endemic to Patagonia, local and partially resident in the extreme south of Chile and Argentina, in Chile restricted to Magallanes district, and it is classified as Near Threatened (NT) in the IUCN Red List.