WD-40 – Black
176-12
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The Black WD-40 is a tiny, deadly mayfly and midge emerger: a slim black thread body, wood-duck tail and wing case, and a sparse dubbed thorax. Few flies fool selective tailwater trout as reliably during Baetis and midge activity.
The WD-40 rides in or just under the film, imitating the vulnerable moment of emergence; the black version matches the darkest small mayflies and midges.
Best for:
- Baetis and midge emergences
- Clear tailwaters and spring creeks
- Dropper below a dry or as a film emerger
📌 Pro Tip: Fish it 18 inches behind a visible dry in the film—the WD-40 hangs in the surface exactly where emerging mayflies stall, and that's where the eat comes.