The Green Machine fly is another highly effective, versatile and utilitarian trout fly. It is considered a salmon fly but we think of it as an essential trout fly as well. It can be fished wet or dry and with any presentation imaginable. Try casting slightly upstream and let it bounce naturally along with the current, with as natural a drift as possible. Keep watching into the water where you think the fly should be and watch for the flash. These Green Machine flies are not tied on salmon hooks. Therefore, we suggest using the Green Machines listed in the salmon flies collection if fishing for salmon.