Sea Duck Joint Venture

A Conservation Partnership under the North American Waterfowl Management Plan

Sea Duck Joint Venture

Sea Duck Joint Venture

Harlequin Duck

Histrionicus histrionicus

Harlequin ducks are small diving sea ducks. Males weigh about 650 g (1.4 lbs); females about 575 g (1.3 lbs). Males are striking, with a slate blue body, white bands and collars bordered by black lines on chest and neck, and a large crescent in front of the eye. They have a white spot behind eye and a white stripe along their neck. A black streak bordered by white and chestnut run along the top of the head, and the flanks are chestnut brown. Their wings are dark brown with an iridescent blue patch on the trailing inner edge and a few white spots or stripes close to the body.

Sea Duck Information Series fact sheet

Harlequin Duck Species Knowledge Summary and Information Needs [PDF]

Aerial Identification video

Harlequin Duck Photo Gallery

Harlequin Duck Range Map


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The Sea Duck Joint Venture promotes the conservation of all North American sea ducks through partnerships by providing greater knowledge and understanding for effective population and habitat conservation and management.