I arrived to find Dave Parmenter watching the bird as it sat on the waterfall at the Dyke, Wycombe Rye. It seemed fairly sluggish for a while but soon started to move round and feed. Other birders joined us over the next hour or so but the bird flew off about 10:30am and was not seen again. It was clearly a continental Black-bellied Dipper.
A short video clip of the Dipper.