Mercury Midge Purple #18

The Mercury Midge imitates tiny midge larvae and pupae, with a reflective bead that mimics the gas bubble of an emerging natural.

A go-to pattern for technical tailwaters and spring creeks. Fish it small and deep, or behind a dry fly when fish are sipping midges.

It fishes well as part of a tandem nymph rig, paired with a smaller dropper behind it.