{
  "url": "https://theflybench.com/patterns/wd-50",
  "id": "cm8wf60if0000djue2w7jun7l",
  "title": "WD-50",
  "slug": "wd-50",
  "description": "A hybrid pattern that blends elements of the WD-40 and RS2, the WD-50 is a proven mayfly emerger with a slim profile, trailing shuck, and subtle flash. It excels in technical water where fish are keyed on emerging Baetis or midge pupae.",
  "imitates": "Midges",
  "patternCategory": "nymph",
  "difficulty": "Beginner",
  "variantOf": "wd-40",
  "targetSpecies": "Trout",
  "waterTypes": [
    "Moving Water"
  ],
  "seasons": [
    "Spring",
    "Summer",
    "Fall"
  ],
  "materials": "**Hook**: TMC2487, Size #18–#24\n**Thread**: Danville 6/0 (70D), Olive \n**Tail**:  Mallard Dyed Wood Duck\n**Body**: Thread body\n**Dubbing**:  uperfine Dubbing, Olive Brown\n**Wingcase**: Medium Opal Mirage\n**Wing Stub**: Mallard Dyed Wood Duck",
  "images": [
    {
      "url": "/images/patterns/nymph/wd-50.webp",
      "source": "The Fly Bench"
    }
  ],
  "videos": [
    {
      "url": "https://www.youtube.com/watch?v=u7YHE7l9ruU",
      "label": "AvidMax"
    },
    {
      "url": "https://www.youtube.com/watch?v=ehxNT9dPBbc",
      "label": "HopperJuan"
    }
  ],
  "createdAt": "2025-03-31T01:57:41.256Z",
  "updatedAt": "2025-04-06T02:38:54.051Z",
  "regions": [
    "Rocky Mountain"
  ],
  "waters": [
    "Green River"
  ],
  "tags": [
    "dead-drift",
    "indicator-nymph",
    "baetis-hatch",
    "midge-hatch",
    "classic",
    "beginner-friendly",
    "low-clear-water",
    "tailwater"
  ],
  "essential": false,
  "tier": "",
  "entomology": {
    "order": "Diptera",
    "family": "Chironomidae",
    "commonName": "Midge",
    "organismType": "insect",
    "lifeStage": "general",
    "behavior": "Midge larvae undulate in an S-shaped swimming motion through the water column and along bottom substrates, often in massive concentrations that carpet lake floors and river beds. These tiny insects (size 18-26) exhibit behavioral drift patterns where they release from the bottom and tumble downstream, becoming easy targets in the current. Their year-round availability and sheer abundance make them a staple food source, particularly in winter when other insects are dormant."
  },
  "relatedPatterns": [
    {
      "slug": "wd-40",
      "type": "variant"
    },
    {
      "slug": "mr-rapidan",
      "type": "same-hatch"
    },
    {
      "slug": "adams-irresistible",
      "type": "same-hatch"
    },
    {
      "slug": "barr-s-vis-a-dun",
      "type": "same-hatch"
    },
    {
      "slug": "adams-fly",
      "type": "same-hatch"
    },
    {
      "slug": "biot-parachute",
      "type": "same-hatch"
    },
    {
      "slug": "the-magic-dun-soft-hackle",
      "type": "same-hatch"
    },
    {
      "slug": "bwo-parachute",
      "type": "same-hatch"
    }
  ],
  "behaviorPresentation": "**Natural Behavior**: Midge larvae undulate in S-shaped swimming motions through the water column and along bottom substrates in massive concentrations. During behavioral drift they release from bottom and tumble downstream, becoming easy targets.\n**Where Trout Eat It**: Runs, tail-outs, and glides in 2-6 feet where trout can inspect food carefully.\n**How to Fish It**: Dead drift near bottom or in the film with high-stick nymphing or indicator rigs for natural drift.\n**Best Water**: Focus on tail-outs, runs, and slicks where smooth water allows selective feeding.\n**Strike Type**: Strikes appear as subtle pauses in the drift or a gentle lift of the indicator, requiring immediate hook-set before the trout ejects the tiny midge imitation.",
  "fishingStrategy": "**Rigging Suggestions**: Use 6X-7X tippet for the most natural presentation. Fish solo or as a trailer 12-18 inches below a small dry fly or larger nymph. The slim profile requires minimal weight for proper depth. **Seasonal Timing**: Most effective from April through October during midge emergences, with peak productivity in (April-May) and (September-October) when midge activity is highest. Remains productive year-round in tailwaters. **Pro Tips**: The silver ribbing enhances visibility and imitates the gas bubble trapped in emerging midge pupae. Match body color to local midge species—black, olive, red, or cream are most common.",
  "overview": "The WD-50 is a variation of the classic WD-40, tied with a slender thread base, a sparse tail of wood duck or mallard fibers, and a flash wingcase that adds just enough pop. The thorax is dubbed with soft natural material like muskrat or rabbit to create a subtle buggy effect. This pattern shines in tailwaters and technical situations where small, realistic profiles are key."
}