I had agreed to give a talk on the identification and surveying of dragonflies and damselflies, followed by a short walk, for the Herts and Middlesex Wildlife Trust at the Colne Valley Visitors Centre, Denham Country Park, on 4th August, and visited today to have a look around the area.
Very good numbers of Banded Demoiselles were present on some of the rivers in the area, with (Large) Red-eyed Damselflies and a single Small Red-eyed Damselfly on the nearby Grand union Canal, and several Emperor Dragonflies and Brown hawkers around, as well as my first Migrant Hawkers of the year. Hopefully the weather will be as good on the day!
Red-eyed Damselfly (or Large Red-eye).
This one was photographed during my recent trip to France. There is less blue at either end of the abdomen than on the similar Small Red-eyed Damselfly (compare with the photo in the 'Hunting French Dragons' post).