Umpqua WD 40 Grey

Umpqua Fly WD 40 is a reliable choice whenever trout lock on to tiny nymphs and midges. The slim, sparse profile cuts through the surface film quickly and matches a wide range of small mayfly and midge larvae. It comes into its own on clear, pressured waters where bulky patterns spook fish or get ignored.

Fish it on a dead-drift under an indicator, as a dropper behind a dry fly, or as the trailing fly in a nymph rig. Sizes 18 and 22 cover most situations from slightly larger Baetis nymphs down to tiny midges. The four colours – Black, Olive, Chocolate and Grey – let you fine-tune to water colour, light conditions and local insects. A simple, proven fly that quietly picks off selective trout when more obvious patterns stop working.

• Type: Small mayfly/midge nymph
• Sizes: 18 and 22
• Colours: Black, Olive, Chocolate, Grey
• Use: Nymphing, dropper behind dry, Euro-style tail fly
• Best for: Selective trout in clear or pressured waters
• Presentation: Dead-drift or slight induced movement