Thanks, folks! I appreciate the comment on the water debris. I've wrestled with this on many of my water bird images as it is usually there to some degree. I have decided to keep it natural unless there is one clump that totally ticks me off.
Great shot Ian. DOF is spot on, nice and crisp. Gotta love the overcast light too.
Edit: looking at your settings Im thinking you could have dropped your shutter speed considerably and brought the ISO down. Still looks damn good for 1600.
That debris in the water looks like seasonal poplar tree (ie "cottonwood") down or "snow", which tends to accumulate on ponds,lakes,rivers,and sloughs in the spring and early summer, at least in my area...so to me, that stuff appears appropriate and natural,and lets me know that it's surely not winter or fall when the photo was shot...just my observation....not sure if AZ has cottonwood trees growing along lake shores and rivers...