This bird was the most frequently seen waterfowl on my recent float trip in central Oregon. It is a (female) Common Merganser, which is a diving duck that feeds on fish. The long, serrated bill is adapted for grabbing and holding slippery fish. These birds often perch on rocks and logs in the water in groups of a couple to as many as 15 or even more. This one is painted in watercolor, using a reference photo from a field guide book. The image here has a pink cast that isn't there in reality - I should have taken the photo in natural light during the day. Photoshop color-balancing didn't completely fix the problem.