- Family: Stonefly
- Size: 9-11mm (Size 14-16)
- Emergence: Early March through late April
- Emergence time: Afternoon
The Nemoura is Montana’s sneaky little Stonefly that doesn’t get near enough ink. It starts early to mid-March, just a bit earlier than the Skwala. They’re a small, dark stonefly, and if you’re not looking for them they’re tough to see. But the trout really know what they are.
Most Missoula fishing guides will run a double dry, skwala and Nemoura, and report 40% of their strikes come to the Nemoura. The adults will fly earlier on the warmer spring days, but start later if the day is cold.
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The nymphs are also important as the trout move into the shallows. A small black nymph is effective in the shallows, emerging alongside the skwalas. Drop-offs and shallow shelves will hold fish looking for nymphs, and while the skwala is bigger, trout don’t pass up a Nemoura nymph.
The crafty angler always has Nemouras in his box for spring fly fishing- dry and sub-surface. The trout know all about them. It’s about time the angler did as well.