Histrionicus histrionicus
The Harlequin Duck, *Histrionicus histrionicus*, is a small, strikingly patterned sea duck revered by birders for its vibrant appearance and unique habits. Adult males are unmistakable with their slate-blue bodies, chestnut flanks, and intricate white markings, including a distinctive crescent on the face and a bold white collar, often weighing between 500-700 grams and measuring 38-45 cm in length with a wingspan of 63-71 cm. Females are a more subdued dusky brown with three contrasting whit...
Breeds along fast-flowing, clear mountain rivers and streams in boreal and subarctic regions; winters exclusively on turbulent, rocky marine coastlines and intertidal zones.
Primarily consumes aquatic invertebrates, including larval insects (caddisflies, stoneflies, mayflies) in freshwater, and crustaceans (crabs, amphipods) and mollusks (limpets, snails) in marine environments. Forages by diving and gleaning from rocks.
Harlequin Ducks are primarily diurnal, spending much of their day diving for food in swift currents or crashing waves. Their foraging strategy involves expertly navigating treacherous waters, using their strong feet for propulsion and their bills to probe crevices for aquatic invertebrates. Durin...
The Harlequin Duck exhibits a disjunct breeding distribution across the Northern Hemisphere, primarily in North America, Greenland, Iceland, and eastern Russia. In North America, breeding populations are found along the Pacific coast from Alaska south through British Columbia, Washington, Oregon,...
Least Concern
- The Harlequin Duck's scientific name, *Histrionicus histrionicus*, and common name "Harlequin" refer to its colorful, clown-like appearance, derived from the Italian commedia dell'arte character. - It is one of the few duck species that regularly breeds along fast-flowing, turbulent mountain ri...