Hook 2XL-3XL heavy nymph hook (e.g. TMC 5263), #6-12
Thread black (or yellow for golden) 6/0 (140 denier)
Materials
Slotted tungsten bead Black bead (1 (to hook size))
Lead-free wire Silver lead free wire (8-10 turns)
Goose biots Black or golden goose biots (2 (tails))
Body dubbing / stretch material Black or golden body dubbing stretch material (abdomen)
Barred rubber legs Black/brown rubber legs (2 sets)
Thin skin Mottled thin skin (wingcase)
Ice dub Black/peacock ice dub (thorax)
Wire rib Fine (1 strand)
How to tie it
Slide the tungsten bead to the eye, wrap 8-10 turns of lead-free wire behind it, and shove the wraps into the bead slot for a fast-sink, head-heavy nymph.
Start the thread and tie in two biot tails at the bend, splayed into a V.
Tie in a wire rib, then dub or wrap a segmented abdomen forward to the 60% mark.
Counter-wrap the rib in 5-6 open turns and tie off.
At the 60% mark tie in a pair of rubber legs on each side and a thin-skin wingcase strip.
Dub a buggy ice-dub thorax, then pull the wingcase over the top and bind it behind the bead.
Add a front set of rubber legs, whip finish behind the bead, and cement.