Overview
The Shop Vac is a small, fast-sinking nymph pattern ideal for clear water and picky trout. It features a slim, dark thread or dubbed body, a peacock herl thorax, wire ribbing for durability, and a soft feather or CDC wingcase. Topped with a gold bead, it gets down quickly and imitates small mayfly nymphs or emerging midges. It's simple, effective, and easy to tie in bulk.
Related patterns
Behavior & presentation
- Natural Behavior
- Midge emergers trapped in the surface film writhe and twist as they attempt to break through surface tension, their bodies creating tiny dimples and disturbances visible to trout from below. These struggling insects accumulate in foam lines and slack water, concentrating their vulnerable presence where selective fish can sip them continuously with minimal energy expenditure.
- Where Trout Eat It
- Designed as emerger-type pattern fished higher in water column in clear tailwater runs where selective trout feed mid-column.
- How to Fish It
- Fish as tag fly above heavier point fly in tandem rig to position it mid-column where emergers naturally occur.
- Best Water
- Target smooth glides with gravel substrate, spring creek pools, and soft pockets behind boulders in 4-8 foot depths.
- Strike Type
- Strikes appear as subtle taps transmitted through the tag line when fished above a heavier point fly, requiring attention to line movement rather than waiting for visual or felt resistance.
Fishing strategy
- Rigging Suggestions
- Can be used in a tandem rig with another midge pattern, or as a dropper off a dry fly.
- Seasonal Timing
- Can be used year-round, but especially effective during midge hatches.
- Pro Tips
- The silver bead and ribbing add flash and help the fly sink fast, making it visible in deeper water.
Where to fish it
Rivers anglers pair with this fly, with local shops that stock it.
River details and fly shops from River & Run, our sister site.
Entomology
Midges trapped in the surface film create dimpled disturbances as they writhe and struggle, unable to break free from surface tension. Trout develop highly refined feeding patterns during midge emergences, sipping these vulnerable insects with barely a ripple as they accumulate in foam lines and slack water.
- Order
- Diptera
- Family
- Chironomidae
- Common name
- Midge
- Organism
- insect
- Life stage
- general
Pattern details
- Stillwater
- Moving Water
- Worldwide
- Rocky Mountain
- Southwest
- dead-drift
- baetis-hatch
- midge-hatch
- beginner-friendly
- searching-pattern
- low-clear-water
