The Royal Stimulator is a legendary attractor dry fly, combining the profile of Randall Kaufmann's original Stimulator and the color scheme of the iconic Royal Wulff. It's big bushy silhouette can imitate a large caddis, a stonefly, or a terrestrial like a grasshopper and these qualities make it highly buoyant fly, capable of anchoring larger weighted nymphs as a dropper.

The Royal Stimulator is especially effective in the summer and fall during prominent stonefly and caddis hatches and as an attractor when no visible hatches are occurring—it's size and flash can coax fish to look up out of curiosity or aggression.