What an amazing spring bird. The only other one of these I've seen was also in Cambridgeshire at Ely Beet Factory some years ago but that was a first winter.
This one was faithfully swimming along behind a couple of Mallard around the sludge lagoons at Grafham Water picking insects from the surface of the disturbed water.
Wilson Phalarope Phalaropus tricolor
Digiscoped wit Nikon Coolpix P4 and 20x Leica APO77