Hook Nymph jig hook (Firehole 516) with slotted bead, 14-18
Thread Rust brown, then light cahill 8/0 (Uni)
Materials
Slotted bead Copper bead (3/32")
Mallard flank Wood duck (tail)
Wire Copper brown wire (rib/underbody)
Midge flash Root beer flash (flash rib)
Goose biot Brown goose biots (1 (body/wing case))
Sparkle emerger yarn Olive brown zelon (legs)
UV resin (undercoat)
How to tie it
Slide a copper slotted 3/32" bead onto a Firehole 516 jig hook. Start rust-brown thread a little short of the middle of the shank.
Strip a few mallard-flank (wood duck) fibers, tie them in on top as a tail, and measure to length.
Tie in copper-brown wire on the side of the shank, poking the end into the bead, and use the wire and mallard butts to keep an even profile; trim the flank at the bead.
Tie in a strand of root beer midge flash, wrap it back three or four turns for a fine flash rib, and tie off.
Tie one brown goose biot on top, palmer the copper wire forward to bind the biot and segment the body, then trim the wire; fold the biot's extended tip back to form the wing case and tie off the rust-brown thread.
Switch to light cahill thread and build a smoothly tapered thread body by stacking wraps next to each other, centering the bead and keeping it no fatter than the bead.
Tie in a couple of strands of olive-brown sparkle emerger yarn on the sides as legs, fold the goose-biot wing case forward, and tie it off behind the bead; trim.
Whip finish. Optionally run a thin line of UV resin along the underside and cure it for a glossy, durable undercarriage, then trim the leg yarn to length.