Anatomic Light Olive Mayfly Nymph

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Today, I’m excited to introduce a fly perfect for late May, when the waters are warmer, and the fish start searching for Mayflies. I tie this pattern on #14 and #16 hooks, using slightly curved models like the Demmon 603 ( for more anatomic appearance). I enjoy creating it in various patterns, adding a light weight to enhance its versatility.

I prefer fishing it with a dry fly rod, and my favourite technique is Pêche à vue (sight nymphing). This fly also performs exceptionally well in other colors, such as brown, dark olive, or yellow. Unfortunately I don’t have time to fish as much as I would like, otherwise I would have a box full of this fly 🙂

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.

Recipe:

  • Hook: Demmon 603 #14-16
  • Thread: Sumo 50DEN
  • Weight: Tungsten wire
  • Body: Mojo Yarn
  • Tail: Partridge
  • Back: Body Thread in dark olive or brown
  • Thorax: Argentinian guard fur
  • Legs: Partridge

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