Note: Contested against a published dressing: Only article found under this name and it disagrees with us in most roles. Source: large black bead-chain eyes (we store a slotted tungsten bead), a natural fox squirrel dubbing-brush body (we store hare's ear or buggy dubbing in rust-brown), Chicone's Crusher Legs in brown-barred clear (we… Source: Fly Fish Food — "Carp Crawler" (fly tying tutorial) — https://www.flyfishfood.com/blogs/fly-tying-tutorials/carp-crawler
Reference Recipe
Hook Jig nymph hook, 8-10
Thread Brown 6/0
Materials
Bead Black or copper slotted tungsten bead (Slotted tungsten, sized to hook)
Tail/legs Barred olive rubber legs (Round rubber, 2 pairs)
Body Rust-brown material (Hare's ear or buggy dubbing)
Collar Brown permanent marker (Hen or India hen hackle)
How to tie it
Slide a slotted tungsten bead to the eye and start the thread behind it on the jig hook.
At the bend, tie in a pair of barred rubber legs splayed as a tail, each about half a shank long.
Dub a shaggy, tapered body forward, stopping a bead's width short of the bead.
Figure-8 a second pair of rubber legs at the front of the body so they kick out to the sides.
Tie in a hen hackle by the tip, sweep the fibers back, and take 2 turns for a soft, mobile collar.
Bind the stem, build a thread collar against the bead, and whip finish.