Adult Stonefly by Veli Autti. A Generic Stonefly Pattern - Oliver Ties it to match the Willow Fly.

Veli Autti Stonefly. A Generic Stonefly Pattern - In this video, Oliver Edwards ‪@LearnFlyFishing‬ ties it to match the Willow Fly. This is a generic pattern that you can use to match all Stone Flies up to about an an inch / inch and 1/4 long - just change colours and size.