This Cormorant was sitting on a log sticking up out of the Willamette River. According to the Sibley Guide to Bird Life & Behavior, studies have shown that when cormorants spread their wings it does not change their body temperature. So, they probably do this just to dry their wings off.
After a few minutes of this, a Common Merganser swam by. It appeared at first that the two birds were going to ignore each other. But then, they both decided to show off their preening skills (how birds clean and smooth their feathers). Check out the video below. Who do you think won the preening contest?