Avocet, Wheatear and Marsh Harrier were amongst the species seen on this well-attended Crayford Marshes bird walk organised by Bexley RSPB, a report of which appears below, thanks to leader Ralph Todd.
http://www.bexleywildlife.org/wp-content/uploads/2017/09/RSPB-Bexley-Group-Walk-Crayford-Marshes-September-2017.pdf