Harlequin ducks are colorful waterfowl that breed in mountain streams and rivers in northwestern and northeastern North America. They are primarily found in Canada and Alaska, although they can also be found in Washington, Montana and Wyoming. They winter along the rocky shores of Alaska, Canada, Washington and Maine. They spend most of their time in fast moving water such as rapids. Although we have heard of people seeing them in the Yellowstone River over the years we have never seen one in Yellowstone until this year. When we arrived there were 5 birds hanging around in the rapids but by the time we left this was the only bird that still remained.