At Manor Farm this evening, highlight was a female BLUE-HEADED WAGTAIL in the pasture field between the farm and the pits. The bird then flew off towards the pit and I couldn't relocate it. The bird looked very similar to the individual seen and photographed at Calvert by Tim Watts a couple of years ago, but the supercilium was more flared behind the ear coverts (apparently within variation) and the throat was a touch cleaner white than the Calvert bird.
Just as nice were the numbers of Yellow Wag - c30 in total, the largest spring flock I've seen in Bucks for a long time.
On the pits were 8 LRP, 2 Green Sand, 2 Common Sand, 1 Shelduck, and 1 Oyc. Unfortunately the water levels have dropped again, by about 6ft, and conditions are looking less and less suitable for waders (Rob Hill).