Thank you Mrsid. I created a small pond at the bottom of my garden and I get 3 varieties every year (but they are late this year). The female needs the male to hold her down while she lays her eggs on the weed just below the surface. The surface tension of the water is a real barrier for such small insects.
That shot was taken with a camera that would be considered to be a toy nowadays. Less than 1 mega pixel and a very slow lens. I've subsequently taken a similar shot with my Olympus c3040Z. That almost froze the movement. The result is more detail but a less dynamic shot.