This Lesser Scaup was eager to see where the call was coming from! It was swimming rather quickly which created a nice wake in front of it, and a dip behind. When combined with my low angle approach it made for a neat effect.
Canon 7D + 500mm f/4 II + 1.4TC, manual exposure, evaluative metering, 1/800s., f/7.1, ISO 800, cropped for composition (after lowering the brownish band above to include it in), audio used.