Harlequin Duck

Close up of the Harlequin Duck.

Harlequin Ducks have an unusual life history. During most of the year, these birds are found in coastal marine environments. However, in spring they leave the salt water to ascend fast-flowing rivers and streams to breed.

During winter, Harlequin Ducks congregate at traditional sites to feed in the swirling waters of shallow and rocky coastal areas. In northern wintering areas, they seek rocky shores and ledges near turbulent water where ice buildup is minimal.

Like many other waterfowl, male Harlequin Ducks leave the breeding areas once the female begins to incubate, or warm the eggs, usually by mid-June to early July. After leaving their mates, males migrate to specific sites to undergo their annual moult, or shedding of old feathers. Females normally join males at these sites and moult one to two months later.