Thanks Guys
The Red Holo diawl bach size 12 has proved the most deadly variation of this nymph.
Infact i was out last saturday at a local stocked still water, lots of muddy run off, the water visability like coffee ! Tried big black lures etc..............it was this little guy on the dropper that took my first two Rainbows of 2011

missed a tug and lost another fish both on my lite damsel.
Oh both were "savage" takes

fish take them with such confidence were as they can be a little nippy with lures as if they are too sure what it is ?