When Harlequin Ducks preen and groom themselves, they go through deliberate contortions which create peculiar sights. I thought of sailboats when I saw this duck.
Moving slightly to the left, he can be seen working diligently behind his wing.
Other Harlequins were even more vigorous.
Mostly they were peaceful and just swam around, diving occasionally for food. When that happens you may be looking at Harlequins one moment, and a second later there would be nothing but water.
Female Harlequins are not as colorful as their male counterparts, appearing mostly brown, with some white patches.
In a few weeks they will be going back way up North, closing this chapter on Harlequin sightings during the 2015-2016 winter season at the Barnegat Lighthouse.