When to use it
- During small mayfly or midge emergences.
- When fish feed in or immediately below the film.
- As a small dropper behind a more visible dry or emerger.
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Emerger · guide 06
RS2
A sparse mayfly-or-midge emerger developed by Rim Chung to fish in, on, or just below the surface film.
- Common size
- #18–24
- Colors reviewed
- gray, olive, black
- Imitates
- mayfly emerger, midge emerger
Look for a slim gray dubbed body, split tails, a small wing tuft, and a sparse thorax. The RS2 is not a generic label for every tiny gray emerger.
Technical illustration
Identification views
RS2 reviewed side profile
A schematic profile emphasizing slender dubbed abdomen and split tails.
- View
- reviewed side profile
- Color shown
- gray body and wing
- Look for
- slender dubbed abdomen; split tails; small wing tuft; sparse thorax
On the water
Understand it. Then fish it.
The river, depth, insects, and fish behavior still decide the final presentation. These are reviewed starting points—not a claim about what is happening today.
How to fish it
- Dead-drift it at the depth where fish are taking emergers.
- Grease only the leader or upper fly when the RS2 should hang in the film.
- Use a controlled lift only when the observed emergence supports it.
Mistakes to avoid
- Calling every gray emerger an RS2.
- Adding a bead or flash wing without labeling a variant.
- Fishing it deep by default when fish are visibly feeding in the film.
Variant control
Small changes matter.
Three reviewed technical illustrations provide a profile, material map, and presentation view. They are identification aids, not photorealistic substitutes for tied examples.
Reviewed core form
Look for a slim gray dubbed body, split tails, a small wing tuft, and a sparse thorax. The RS2 is not a generic label for every tiny gray emerger.- Colors shown
- gray, olive, black
- Weighting
- Weighting is stated in the identification and use notes when it defines the reviewed form.
Review trail
Sources, rights, and limits.
Pattern facts were reviewed on 2026-07-12. Every image has its own rights record; photographed hand-tied flies may still vary slightly in proportion.