Just as with the midge pupae, the adult midge is of great importance to both fish and fly fisher. Especially so early and late in the season when a large hatch can bring good sized fish to the surface. J:son’s imitation of an adult midge also works great to imitate a large number of other small insects that fish feed on, including micro caddis. Often fish will turn selective during a midge hatch and it’s important to always keep imitations of both the pupae and the adult midge in your fly box. Remember to approach a fish with ease that is feeding on adult midges. Observe and be patient. We recommend that you use a J:son Swivel for all your fly fishing, no matter what type of fly you are using. However, it is necessary to use a J:son Swivel whenever you fish a size 1 or 2 J:son fly.