The Stimulator is a favourite dry-fly pattern, which, coming from someone with vastfishing experience across the globe, says much for its effectiveness. It will take fish under varying conditions and Randall uses it on lakes and streams, but is at its best in fast water. The Stimulator is a combination of several attractor and exciter patterns and imitates caddisflies, stoneflies and, at a pinch, grasshoppers.
What makes the Stimulator so effective? Like many successful dry flies, the Stimulator imitates several food forms in general, yet nothing in particular. By varying tail, hackle, body and wing colours a variety of insects — both terrestrial and aquatic — can be matched. The Stimulator combines the general shape and characteristics of patterns such as the Trude series of flies with the attributes of more established downwing patterns such as the Sofa Pillow, all of which were designed initially to imitate the adult stoneflies found on rivers in the western United States. Kaufmann’s Stimulator, however, is not limited to the imitation of stone- fly adults: it is used with great success to imitate other aquatic and terrestrial insects, including adult caddisflies and terrestrials such as grasshoppers and cicadas. The Stimulator has all the characteristics of a western-style dry fly designed for fast-flowing freestone waters and consequently is ideally suited to the fast pocket-water stretches of South African rivers and streams. Read the rest of this entry »