Micro Perdigon Nymph #20 gives technical-water anglers a compact tungsten nymph for clear water, tailwaters, and selective trout. The slim ribbed body is sealed under a hard UV-cure resin finish to reduce bulk and help the fly reach depth efficiently.
This pattern is tied on a barbless curved standard nymph hook with a downturned eye. It is not a jig-hook pattern. The head uses an approximately 2.8 mm JIG OFF tungsten bead—an offset-hole bead style, not a slotted tungsten bead.
Explore Rivfly Euro Nymphing flies, materials, and guides.
Why Fish a Size #20 Micro Perdigon?
Small Baetis and midge-type food can be important when trout are feeding selectively. A size #20 profile is useful when larger nymphs draw refusals, especially in low, clear water, winter conditions, spring creeks, and heavily fished tailwaters.
This fly can be used as a light dropper behind a heavier point fly, or fished on its own when current and depth allow. Sink rate always depends on rigging, tippet diameter, current, and water depth; the tungsten bead helps add weight without turning this micro pattern into an oversized fly.
Hook and Bead Construction
- Hook: #20 barbless curved standard nymph hook
- Eye: Downturned eye
- Bead: Approximately 2.8 mm JIG OFF tungsten bead (offset-hole style)
- Body: Ultra-fine ribbing under a UV-cure resin coating
- Hook style boundary: Standard nymph hook—not a 60-degree jig hook
The offset-hole JIG OFF bead helps the bead seat on this hook shape. It should not be described as a slotted bead, and the finished fly should not be presented as riding hook-point-up like a jig-hook nymph.
Olive or Orange?
Olive offers a more natural, subdued profile for clear water, pressured trout, and Baetis-type situations.
Orange adds contrast when you want a small attractor profile or a more visible fly in a two-fly rig. These uses are practical starting points rather than guaranteed rules; fish response and water conditions should guide the final choice.
How to Fish This Micro Perdigon
Use fine tippet that passes cleanly through the small hook eye and allows the fly to move naturally. In a two-fly Euro nymph rig, the Micro Perdigon can be placed as the smaller dropper behind a heavier point pattern such as the Glow Attractor Perdigon. Watch the sighter for pauses, ticks, or changes in speed; takes on small flies may be subtle.
Because this is a standard-hook nymph rather than a jig-hook fly, do not assume it will always ride hook-point-up or avoid bottom contact. Snag resistance depends on the hook, rig, drift angle, current, and riverbed.
Micro Perdigon Nymph #20 Specifications
| Specification | Detail |
|---|---|
| Product SKU | NY-PN |
| Size | #20 |
| Hook | Barbless curved standard nymph hook, downturned eye |
| Bead | Approximately 2.8 mm JIG OFF tungsten bead; offset-hole style, not slotted |
| Hook length | 9 mm |
| Hook gap | 3 mm |
| Body | Ultra-fine ribbing under UV-cure resin |
| Colors | Olive, Orange |
| Suggested water | Tailwaters, spring creeks, clear or low-water conditions |
Frequently Asked Questions
Is this Micro Perdigon tied on a jig hook?
No. It uses a barbless curved standard nymph hook with a downturned eye. Rivfly identifies jig-hook products separately.
Is the tungsten bead slotted?
No. The current product uses an approximately 2.8 mm JIG OFF tungsten bead with an offset-hole construction.
Does the tungsten bead eliminate the need for extra weight?
Not in every situation. It adds useful weight to a small fly, but current, depth, tippet, rig design, and local regulations determine whether additional weight is appropriate.
Which color should I start with?
Choose Olive for a natural presentation in clear water. Try Orange when a small amount of extra contrast may help. These are starting points, not guarantees.
These are proper competition-style flies. Slim, fast, deadly.
The finish on these is really impressive — smooth, hard, and shiny. That’s what makes a perdigon work and these get it right. I use these when I need to cover a lot of water fast because they swing into position quickly and efficiently.
These are arts, the smallest flies I’ve ever use
Size 20 perdigon is not easy to tie well. I know because I’ve tried. The epoxy finish on these is smooth all the way down to the bend — no lumps, no thin spots. That matters because any imperfection in the finish changes how the fly sinks and moves. On picky fish in clear water, this level of detail is the difference between getting takes and getting refusals.