This tungsten skwala nymph gets down now! It is heavy and tasty looking. Skwalas are the spring stonefly. They can hatch when the water is high and cold, which means trout don't want to move a lot for a fly. That is why this gets down to the fish with the tungsten bead. Fish this fly from January through April in Western Rivers to catch those big trout that skip mayflies and go right for the stones.