Three factors came together to make perfect conditions for photographing ducks. The first two factors were sun and wind. The wind was gusting south-east, which meant the ducks would be landing facing towards the sun, which wasn't hiding behind any clouds. The third, and most important factor is that there were plenty of ducks around for us to shoot.
There are lots of ducks now, because it is their peak migration season. Most of the birds here now use the marsh as a staging area, or a pit stop in the spring and fall as they travel all over.
Fred compared photographing ducks with sports. The comparison proved to be true, as you are photographing a subject with which you have little or no control. All you can do is put yourself in the right position to get the photographs you are looking for. You quickly realize, however, that ducks travel a lot faster than any hockey or football player. Many of my photos were back focused as I tried to track the birds while they zig zagged over the marsh.
To see more photos, check them out at Ducks at TrevorHagan.com