The Stimulator often just called "Stims" is an amazing fly trout pattern. The Stimulator fly was originally developed by Randall Kaufmann to imitate a stonefly adult. But that is not the only insect the Stimulator flies can imitate, it can be seen as a grasshopper, caddis or even large drake mayflies! It is also a great dry fly for fishing a dropper underneath - during summer we see Stimulators with Buzzers suspended below, the Stimulator looks like a caddis or sedge. The bushy profile and deer hair make the Stimulator a highly buoyant fly.
Stimulator Flies Seasonal Usage Guide
Imitate a Stonefly, hatching March to October, plus a Caddis or Sedge which hatches from June to October, this fly is al fly for all seasons.
This is the best that I have found in 17 years of trout fly fishing. Supple, visible and turns over effortlessly. The loop attachments are just the right size making it easy to attach to fly line and tippet ends.