The Diademed Plover is a small shorebird with a black head crossed by a white band, a chestnut neck, and a long slender bill. It lives along rivers and wetlands in the high Andes and is recorded along the Argentine Andes.
It has a black bill, yellow legs and a white brow band extending around the crown. The hindneck and sides of the neck are rufous. Fine black bars densely mark the white breast, while the belly is white in the center with sparser dark lines at the sides.
It walks along high-elevation river edges and marshes, alone or in pairs. It nests in a shallow hollow on the ground where grass is sparse.
In central Chile it holds breeding territories near permanent water. It lines a small hollow in mud or sand with plant fragments and stones, reusing the nest or nearby sites.
In central Chile it usually lays two eggs, with both parents alternating incubation for about 30–35 days. Chicks leave the nest, stay nearby during their first days and explore farther within the territory with their parents as they grow.
It probes mud for small invertebrates along streams, rivers and shallow pools or lakes, and also picks up prey detected by sight.
An extinction-risk assessment has not been added yet.