well looking at your exif data you could have done both since at 5.6 you were at 1/4000 of a second in reality you only need about 1/200 to stop motion (depends on how fast things are moving but for water it should be fine) you could have easily gotten the same image using somewhere between f8-f11 and that woudl have given you the DOF you needed to get the whole bird into sharp focus.
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Rex K
The view from my "office" doesn't suck. 
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