RS2 Gray Midge: Created by Colorado angler and tier Rim Chung in the 1970s, this simple emerger pattern (short for “Rim’s Semblance 2”) was originally developed for the selective trout on the South Platte River
Effective Midge & Mayfly Emerger Imitation: Precisely imitates emerging midge pupae and small mayflies in the surface film, a stage when trout are often most selective
Premium Sparse Construction: Hand-tied with a slender gray thread body, fine ribbing, split microfibbets or shuck, and minimal wing for a realistic, low-riding profile
Excellent for Technical Waters: Performs exceptionally well on tailwaters, spring creeks, and clear rivers where trout are feeding on emerging midges; highly effective for brown, rainbow, and cutthroat trout
Must-Have Emerger Pattern: A reliable, go-to fly in sizes 18–24 when trout are ignoring traditional dries and keying on emergers in the film
