Saw this on Hans' Danica site, tied by Alberto Jimeno; always thought it was a cool looking fly. Haven't fished one, but it looks like it might work.
hook - Mustad 9671 #8
thread - UTC 140 black
abdomen - Ultra wire medium red
thorax - floss green
wing - mallard dyed wooduck
hackle - grizzly
Part 1
mash barb and start thread at 60% mark
tie in wire on top of hook and wrap back to point right above the barb
wrap wire forward
tie down, helicopter the wire 'till it breaks and wrap smooth
tie in floss
wrap forward, back and forward, trying to keep it smooth; it could definitely be smoother still, but I was tying this one in my basement on top of the washing machine (don't ask); tie off floss
pull fibers off mallard feather, trying to keep tips even
measure wing for for length (let it extend hook gap distance past the butt)
and tie in