Midge / EmergersTron Emerger
A modern emerger pattern that uses flashy materials and UV resin to create a highly visible and effective fly. Ideal for fishing during midge and mayfly hatches.
Year Round
Intermediate
Trout
Apr 2025
Overview
A slim-bodied emerger pattern with a trailing shuck, lightly dubbed thorax, and a sparse synthetic wing. It rides just below or in the film and is often tied in olive or gray. Designed for technical hatches when fish are suspended mid-column.
Materials
Hook: #14-18 Daiichi 1560
Thread: Olive 12/0 Veevus or 8/0 UNI
Tail: Olive Zlon or Antron Yarn
Body: Olive Zlon or Antron Yarn
Thorax: Olive Zlon or Antron Yarn
Casing: Olive Zlon or Antron Yarn
Legs: Olive Zlon or Antron Yarn
Behavior & Presentation
Natural Behavior: Mayfly emergers struggle to break through the surface film during hatches, suspended between stages with wings partially expanded. Many become trapped with trailing shucks, drifting helplessly as they attempt to complete emergence.
Where Trout Eat It: Trout focus on emergers suspended mid-column in slow glides and eddy lines where ascending insects hang vertically during hatch windows. The UV resin body positions this pattern between subsurface and surface feeding zones, targeting trout keyed on transitional insects neither fully in film nor deep in water column.
How to Fish It: Fish with greased leader to suspend just below the film, maintaining dead drift with minimal rod movement. Apply floatant to topside of thorax and wings but not abdomen, allowing fly to sink into film. Unlike bulkier emergers, the Tron's slim Zlon body creates subtle movement without aggressive manipulation—trust the static drift.
Best Water: Work slow glides with greased leader presentations and eddy margins where current slows. Fish seams along weed edges. The slim profile excels in technical tail-outs and slack pockets where fish scrutinize drifting food.
Strike Type: Subtle sips or dimples on the surface signal delicate takes—set gently with smooth lifts on fine tippets.
Fishing Strategy
Rigging Suggestions: Fish solo on 10-12 foot leaders tapered to 6X or 7X tippet. The UV resin body provides subtle weight, eliminating need for additional split shot in most situations.
Seasonal Timing: Year-round productivity with peak effectiveness during (March-May) and (September-November) midge and mayfly emergence periods.
Pro Tips: The translucent UV resin shell creates lifelike light refraction similar to natural insect bodies. The white wing provides excellent visibility for anglers while appearing natural to fish. Effective as a searching pattern when no obvious hatch is occurring.
Entomology
Small emergers transition through the surface film with their abdomens still underwater while their thorax and wing cases break into air, creating a vulnerable half-emerged profile. Fish focus intently on these transitional insects because they combine subsurface and surface elements, appearing during overlapping midge and mayfly hatches when trout feed selectively on specific emergence stages rather than fully developed adults.
- Order
- Ephemeroptera
- Common Name
- Mayfly
- Organism Type
- insect
- Life Stage
- general