![](https://www.flytying.ro/wp-content/uploads/2025/01/Nymph-back-made-with-thread-and-body-details-980x654.jpg)
Here’s a video showing how a mayfly nymph using Mojo Yarn.
Of course, this is a classic fly that can be tied with various materials. In this video, I demonstrate how I use Mojo Yarn for the body of this pattern.
Materials:
- Hook: Demmon 603 #14-16
- Thread: Sumo 50DEN
- Weight: Tungsten wire
- Body: Mojo Yarn in any color you like
- Tail: Partridge
- Back: Body Thread in dark olive or brown
- Thorax: Argentinian guard fur
- Legs: Partridge
Tying Tips:
- Avoid overloading the hook with too much lead or tungsten wire. The fly should move naturally in the water, sinking slowly and drifting easily with the currents.
- Keep the body slim. The insects you’re imitating are fine and delicate, so a thinner body is more realistic.
- Use an appropriate thread for the underbody. Avoid black thread, as it can negatively affect the appearance once wet. While a dry fly might look perfect when tied, a black underbody can give it an ineffective shade when submerged.
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