Giant Black Stonefly Nymph

Hook Size: 4/6, The Perfect Fly Giant Black Stonefly nymphs crawl out of the water to hatch in the mid to early afternoons and on into the evening.

Pteronarcys dorsata (Giant Black Stonefly) Stonefly Nymph Pictures

Stonefly Life Cycle & Fly Fishing Stonefly Patterns - FrostyFly

Yakima River Stoneflies

Giant Black Stonefly Nymph

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Big Black Stone-Fly Nymph

Parker Bausman 🦟 (@ParkerBausman) / X

Pteronarcys dorsata nymph - Giant Stonefly - Bug Blog

The Black Crystal Stonefly Nymph for trout fishing

Top stonefly nymphs: the catchiest patterns!