NymphbeginnerMidwest & Driftless
Sow Bug
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 Sow Bug
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
Driftless Angler
Matched on Midwest & Driftless, nymph flies, trout. Driftless-specific trout source for spring creek nymphs, dries, and local bug windows.
Fulling Mill Flies
Matched on nymph flies, trout, nymph. Large pattern house with broad freshwater and saltwater fly categories.
Big Y Fly Co.
Matched on nymph flies, trout, nymph. Broad by-type catalog useful for common benchmark patterns and inexpensive backups.
Murray's Fly Shop
Matched on nymph flies, trout, nymph. Appalachian trout and smallmouth source with long-running regional fly catalog depth.
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.
Sow bugs are the other crustacean that Driftless trout cannot stop eating. These flat, armored isopods carpet the aquatic vegetation in spring creeks, and trout graze on them the way cattle graze on grass -- steadily, relentlessly, and without dramatic flair. This pattern sits in the film of the weeds and tumbles free in the current, at which point a trout eats it with the casual indifference of something that has eaten ten thousand of them before.
Quick Facts
Where to Fish It
Timber Coulee Creek
WI · Spring Creek
Whitewater River
MN · Spring Creek
Roaring River
MO · Spring Creek
Loading map...
Related Reading
region guide
Driftless Area: Spring Creek Paradise
Tucked into the unglaciated hills of southwestern Wisconsin, southeastern Minnesota, and northeastern Iowa lies the Driftless Area — a landscape of cold spring creeks, limestone bluffs, and wild trout that rivals any destination in the country. This is the complete guide to fishing the Driftless.
seasonal playbook
The Spring Playbook: First Hatches to Full Send
Spring is the most dynamic season in fly fishing — water temperatures swing daily, hatches emerge in waves, and fish that have been dormant for months begin feeding with increasing urgency. This is your region-by-region playbook for fishing the awakening.
technique
Fly Selection: A Decision Tree for Every Situation
Most anglers open their fly box and stare at it like a menu in a foreign language. But fly selection isn't mystical — it's a decision tree. Start with what the fish are eating, narrow by presentation depth, match the profile and size, and you'll arrive at the right fly in under sixty seconds. Here's the system.
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
NymphbeginnerDriftless Scud
FlyboxFind a tier or trusted source
Midwest & Driftless
#14 - #18
Tier reference: Mat Wagner
Curved-hook scud pattern for upper Midwest spring creek trout, from Wisconsin and Minnesota Driftless water to Iowa limestone creeks. Olive or pink. The daily bread of Driftless brown trout.
Brown Trout · Brook Trout · Rainbow Trout
NymphbeginnerZebra Midge
FlyboxFind a tier or trusted source
Midwest & Driftless
#18 - #22
Simple thread-body midge pupa with a bead head. Deadly in winter and early spring when midges dominate the drift.
Brown Trout · Brook Trout · Rainbow Trout
NymphbeginnerPheasant Tail Nymph
FlyboxFind a tier or trusted source
Midwest & Driftless
#14 - #20
The universal mayfly nymph. Pheasant tail fibers over copper wire. Imitates Baetis, PMDs, and most small mayfly nymphs.
Brown Trout · Brook Trout · Rainbow Trout
NymphbeginnerGold-Ribbed Hare's Ear
FlyboxFind a tier or trusted source
Midwest & Driftless
#12 - #18
Buggy, impressionistic nymph tied from hare's ear fur. Imitates mayflies, caddis pupae, and assorted creek debris.
Brown Trout · Brook Trout · Rainbow Trout
NymphbeginnerMop Fly
FlyboxFind a tier or trusted source
Midwest & Driftless
#10 - #14
Chenille mop strand on a jig hook with a bead head. Controversial among purists. Devastatingly effective in stocked and wild water alike.
Brown Trout · Rainbow Trout
NymphbeginnerBlack Hills Pheasant Tail
FlyboxFind a tier or trusted source
Midwest & Driftless
#14 - #20
Pheasant tail nymph adapted for South Dakota's Black Hills spring creeks. Tungsten bead and slim profile sink quickly in the fast-flowing freestone runs of Rapid and Spearfish creeks.
Brown Trout · Rainbow Trout