The WD-40 Nymph is a proven small-profile trout fly designed to imitate emerging insects and midges, making it a go-to pattern when fish are feeding subsurface and keyed in on subtle presentations.

Tied on a barbed hook.

Built with a slim, natural profile and soft movement, this fly excels in clear water and pressured fisheries where trout are selective. The WD-40 is especially effective when fished as part of a nymph rig or as a dropper behind a dry fly, producing consistent results when larger patterns are ignored.

Whether you're targeting rising trout or fishing deeper runs, this pattern is a reliable option when conditions call for precision and finesse.

Why It Works

• Slim profile matches small emerging insects
• Subtle movement triggers strikes from pressured fish
• Effective in clear water and technical conditions
• Proven pattern for consistent trout production
• Ideal for nymph rigs and dry-dropper setups

Best Uses

• Nymph rigs
• Dry-dropper setups
• Clear water conditions
• Pressured trout
• Slow and moderate currents

Target Species

• Trout

Available Sizes

• Size 18
• Size 20