NymphintermediateRocky Mountain West
WD-40
Flybox sourcing profile
No TWG price or checkout is active. Use this page to validate the fly, then source it through the mapped tier or trusted fly shops.
Pattern Ledger
Source WD-40
Want help finding this exact pattern or a tied-to-order equivalent? Join the sourcing ledger and we will prioritize demand by water, species, and pattern.
Trusted Sourcing Ledger
Find this fly from an independent source
Exact links are published only after the product name and live page are checked. TWG does not sell the fly, set the price, or control stock, shipping, or returns.
Exact source still under review
We have not published an exact product link for this pattern yet. The directory below can help locate a regional specialist, but it is not proof that the exact fly is currently listed.
Regional source directory
Rocky Mountain Fly Design
Matched on Rocky Mountain West, nymph flies, trout. Colorado tier and shop lead for Rocky Mountain trout, bass, and predator patterns.
Taos Fly Shop
Matched on Rocky Mountain West, nymph flies, trout. New Mexico/Southwest trout shop lead for Rio Grande, San Juan, Pecos, and high desert water.
Stillwater Fly Fishing Store
Matched on Rocky Mountain West, nymph flies, trout. Specialist stillwater source for balanced leeches, chironomids, and lake-trout logic.
Fly Fish Food
Matched on nymph flies, trout, midge. Strong technical tying and trout catalog coverage, especially nymphs, dries, and stillwater flies.
These are independent businesses. A listing does not imply endorsement or partnership. TWG currently receives no purchase commission from these links. Any future paid or affiliate relationship will be labeled beside the relevant link.
Named not after the lubricant but after the principle that some problems require a universal solvent. The WD-40 was created on Colorado's South Platte to address the daily crisis of selective trout eating tiny things you cannot see. It imitates emerging midges and small mayflies with a thread body and a wisp of mallard flank, and it works with the reliable consistency of the product it was named after. When the fishing is difficult and your ego is bruised, tie on a WD-40 and quietly get back to work.
Quick Facts
Where to Fish It
South Platte River
CO · Tailwater
Frying Pan River
CO · Tailwater
San Juan River
NM · Tailwater
Loading map...
Related Reading
hatch guide
Midge Fishing: The Tiny Flies That Save the Day
When every other hatch has shut down, midges keep trout feeding. From winter tailwaters to high-altitude stillwaters, Chironomidae are the most abundant insects in freshwater ecosystems. Learning to fish these tiny patterns unlocks twelve months of dry-fly and nymphing opportunities.
seasonal playbook
The Winter Guide: Cold Water, Warm Hands, Willing Fish
Winter separates the dedicated from the fair-weather crowd. The rivers are empty, the hatches are tiny, and the fish feed in slow motion. But they do feed — they have to. And the angler who understands cold-water metabolism, midge biology, and the art of slowing down will find winter fishing not just productive but deeply rewarding.
You Might Also Like
NymphbeginnerCopper John
FlyboxFind a tier or trusted source
Rocky Mountain West
#12 - #20
Tier reference: Satoshi Yamamoto
John Barr's tungsten-headed nymph. Sinks fast, flashes bright. The most productive nymph in the West.
Rainbow Trout · Brown Trout · Mountain Whitefish
NymphbeginnerPheasant Tail Nymph
FlyboxFind a tier or trusted source
Rocky Mountain West
#14 - #20
Frank Sawyer's original, perfected by American tiers. Pheasant tail fiber body, copper wire rib. The most important nymph ever tied.
Rainbow Trout · Brown Trout · Cutthroat Trout · Brook Trout · Mountain Whitefish
NymphbeginnerHare's Ear Nymph
FlyboxFind a tier or trusted source
Rocky Mountain West
#10 - #20
Dubbed hare's ear fur body with a gold rib. Buggy profile suggests mayflies, caddis, and stoneflies simultaneously.
Rainbow Trout · Brown Trout · Cutthroat Trout · Brook Trout · Mountain Whitefish
NymphbeginnerPrince Nymph
FlyboxFind a tier or trusted source
Rocky Mountain West
#10 - #18
Doug Prince's attractor nymph. Peacock herl body, biot wings, brown hackle. A searching nymph that works when nothing else does.
Rainbow Trout · Brown Trout · Cutthroat Trout · Brook Trout
NymphbeginnerPat's Rubber Legs
FlyboxFind a tier or trusted source
Rocky Mountain West
#4 - #10
Oversized stonefly nymph with rubber legs. Tungsten weighted. Gets to the bottom fast and stays there.
Rainbow Trout · Brown Trout · Cutthroat Trout · Mountain Whitefish
NymphintermediatePerdigon
FlyboxFind a tier or trusted source
Rocky Mountain West
#14 - #20
Spanish competition nymph. Slim UV-resin body over thread, tungsten bead. Sinks like a stone, minimal drag in current.
Rainbow Trout · Brown Trout · Cutthroat Trout