WeirWood late morning. Just visited the dam today. Still 2 Common Samds on the dam. 2 Black Terns dropped in at 11:30 and promptly flew towards the west end. 3 Common Terns also did the same a short while later. A look around the area below the dam again produced Whitethroat, Blackcap and the same or another Grasshopper Warbler by the orange structure next to the overflow. In the overflow another Common Sandpiper and 3 Grey Wagtails.