http://peteralfreybirdingnotebook.blogspot.com/ for more
This Knot is Beddington's 20th (I think). It is presumably of the race islandica which means this little bugger has come from either Arctic Canada or Greenland. The species is famous for non-stop 5000km flights so this particular Knot has flown are very long way and over amazingly scenic places and despite being able to fly 5000km without landing, it had decided to land on a bed of human excrement in Croydon. Very strange.