There is a small stream near to my office in North Wales that has a pair of dipper on it. Sometimes I pop out in my lunch hour with the camera to see if I can find them. I have built up a small library of shots in this way. The shot below is the only time I have not seen one on a rock in the river channel. The bird was perched on a bit of wood debris that had become wedged on a small weir which created an unusual setting.
Shot with 1Dmk2N and 500mm lens at IS0320 F5 at 1/320s
Above nits mentioned ,I would also like to add that to my eye the perch is a bit distracting (something that I find myself guilty of all the time ) as the brightness of the wood keeps taking my eye off the bird
Tim