Popped down to the River Ise at Finedon this lunchtime to see if there were any Banded Demoiselle around. There weren't, but I did see 5 Large Reds, including one emerging. The recent heavy rains have caused the river to swell and have badly damaged the vegetation along the margins here, fortunately prior to the beginning of the main emergence period here (the river is always later than other areas).
