Heron Trail: female RED-FOOTED FALCON aerial feeding over Heronry North and sanctuary area mid afternoon to early evening, but no sign after 6pm. Also 2 Hobbies. Turtle Dove singing by Hayden Hide late afternoon, plus adult KITTIWAKE flew south.
Some record shots of the falcon by James Hanlon here: http://cambsbirdclub.blogspot.co.uk/2016/05/red-footed-falcon.html
Washout Pit: GREAT REED WARBLER singing still mid afternoon.