Lovely shots everyone, I particularly like the mallards in flight that a few of you have captured.
Bob, you just beat me to it with the shoveler. Here's mine anyway:
1D Mark IV, EF300mm f/2.8L IS USM +1.4x @ f/7.1, 1/640s, ISO 200
Two male eiders chasing a female in Svalbard:
5D Mark II, EF100-400mm f/4.5-5.6L IS USM @ 400mm, f/8, 1/640s, ISO 100
It's important to "get all your ducks in a row" for a good in-flight composition:
5D Mark II, EF100-400mm f/4.5-5.6L IS USM @ 400mm, f/8, 1/800s, ISO 100