This one is: World Famous in New Zealand, often seen as a dry fly more so than as a wet, however the wet fly is a great little snail pattern fished slowly across lake weedbeds.
Sizes 10 to 18, body of peacock herl, hackle black hen and peacock sword tied back as the wing.

The dry has a tail and body of black cock, a body of peacock and wings of a bunch of peacock sword herls positioned upright and split and that fly is a local standard beetle or blowfly pattern primarily for still water. A variation of that is the hackle tied parachute.