Histrionicus histrionicus

The Harlequin Duck is a small sea duck adapted to fast-moving water. Males are patterned in blue-grey, chestnut and white, while females are dark brown with white spots on the face. In winter it dives for marine invertebrates along rocky coasts and in surf. During the breeding season it moves inland to cold, fast-flowing mountain streams. The species often remains close to shore and rests on exposed rocks.
Locations where this species is supported by a dated first record, an unambiguous single-place outing or a reviewed assignment.