28th July - persistent rain until late evening. Light westerly, 14C

A pretty poor weather day, but one that made Arctic Terns and a few waders move today.

Stanford Reservoir;  during the morning rain Chris had 5-6 Arctic Terns through. This afternoon, in the rain, I had 2 Arctic Terns, along with 6 Common Terns. Plenty of Swallows and Martins feeding low over the water, ~4000.

 I had a brief view of a Swift spp that flew passed me, while looking through a gap in the water side trees, about 20-30 ft above the water, no other Swifts just Martins and Swallows.  It seemed at first Swallow like, a little larger, more plump than a Common Swift, with slightly broader wings.  It appeared a fawn brown colour, not the dark brown or the rapid wing beats of a Common Swift. Slight lighter in the throat area.  Very tantalising,  it was too much brief to identify and not found again.