As Mike Collard has already mentioned we (Mike, Rose and myself) had a distant view of a female/juvenile MARSH HARRIER, heading South between the Ivinghoe Beacon and Tring. This was the only bird of note in four and half hours, although there were up to 6 Common Buzzards and 2 Hobbys present. There were relatively few kites and most were in heavy moult. It was very difficult picking out raptors because they were so high and generally distant. Very little passage, a few Swallows and a single Common Swift.
Later at Wilstone Reservoir the number of COMMON GREENSHANKS was 6 (Steve Rodwell)