Show me your sharp duck shots!

I recently bought a Sigma 80-400mm f/4.5-5.6 EX DG APO OS lens. I am quite impressed with the sharpness of this lens. This New Zealand Scaup (diving duck) was taken handheld with a Nikon D70, 1/90 shutter speed at 400mm. This is straight out of camera, no USM etc. Anyway, show me some of your waterfowl shots - esp. ones where you can see the beeding of the water and lines in the feathers like on my little ducky!