Micro Mayfly Nymph – Tungsten Bead Head BWO Nymph

A highly detailed micro nymph designed to imitate Blue-Winged Olives and other small mayflies. Tied with a tungsten bead to get down quickly, this is a guide favorite for fishing the clear, challenging waters of the Upper Delaware River.

Description

When trout are feeding on small mayfly nymphs, a realistic presentation can make all the difference. Capt. Ken’s Micro Mayfly Nymph is a compact, highly detailed pattern that closely resembles Blue-Winged Olives (BWOs) and many other smaller mayfly species.

These flies are tied with tungsten beads to help them sink quickly and reach the feeding zone. Their small profile makes them particularly effective in crystal-clear water, where trout have plenty of opportunity to inspect an offering before deciding whether to eat it.

This pattern has quickly become a favorite among our guides on both the East and West Branches of the Delaware River. It is an excellent choice when trout are selective and larger nymphs are being ignored.

Why Fish the Micro Mayfly Nymph?

• Realistic micro profile: Closely imitates Blue-Winged Olive nymphs and other small mayflies.

• Tungsten bead: Provides the weight needed to get down quickly.

• Small presentation: Especially useful in clear water and when fishing to selective trout.

• Guide favorite: A productive pattern used by our guides on the East and West Branches of the Delaware.

How to Fish It

Fish this pattern as part of a nymph rig through riffles, runs, seams, and deeper feeding lanes. Its tungsten bead helps it reach the proper depth without relying on an oversized fly.

Try it as a single nymph or pair it with another pattern in a multi-fly rig. When trout are selective, this smaller mayfly imitation can be an excellent fly to use as your primary offering.

Capt. Ken’s Guide Tips

On the Delaware system, clear water and educated trout often call for smaller, more realistic nymphs. I keep Micro Mayfly Nymphs in both sizes available because matching the size of the natural insects can be critical. If trout are refusing larger patterns, don't be afraid to downsize to a #18

Details

• Pattern: Micro Mayfly Nymph

• Style: Tungsten Bead Head Micro Nymph

• Imitation: Blue-Winged Olives and smaller mayflies

• Sizes: #16 and #18

• Available Options: Single fly, 3-pack, and half-dozen (6 flies)

A must-have small nymph for clear-water trout fishing, especially when targeting selective fish on the East and West Branches of the Delaware River.