Correct, Johnnie. The emerging duns ( sub-imagoes ) are called Green Drakes, because of their colouring; the spinners ( imagoes ) are Grey Drakes. After mating and egg-laying (ovi-positing ) the females end up on the water, dying, with wings outspread on the surface, and are then termed, Spent Gnats. Why 'Gnats', I know not. These are the terms generally applied to Ephemera danica, the more common of the two species known to be extant. E. Lineata was extremely localised when it was about, south-east of England, I think; but I'm not sure if any remain. E vulgata is not as common as its name suggests, but I think I have seen them on the Eden -- a good while back -- and the secretary of Kirkby Stephen anglers, John Garner, reported a sighting last year on the upper Eden. TC
PS. What's the latest news on E lineata, Paul? Thanks, in anticipation.
Last edited by guest3; 18-06-2009 at 01:39 PM.
|