Harrop’s Mayfly Nymph – BWO
Match the hatch perfectly with the Harrop’s Mayfly Nymph – BWO, an essential pattern for the cloudy, cool days when Blue Winged Olives are active. This fly offers a precise imitation of the BWO life cycle, critical for success on technical trout streams.
Product Specifications
| Feature | Detail |
|---|---|
| Pattern Type | Nymph |
| Imitation Species | Blue Winged Olive (BWO) |
| Best Use Conditions | Cloudy, cool days |
| Target Environment | Technical trout streams |
FAQ
What makes the Harrop’s Mayfly Nymph – BWO effective in imitating the BWO life cycle?
The fly is designed to closely replicate the appearance and movement of the Blue Winged Olive nymph stage, which is active during cloudy, cool conditions. Its shape and materials match the natural behavior of the nymph in flowing water.
Is this pattern suitable for use in fast-moving streams?
Yes, the Harrop’s Mayfly Nymph – BWO is specifically tailored for technical trout streams where fast currents require precise, natural-looking imitations.
Can this fly be used year-round?
Please contact customer service

Diane Peters –
This fly worked exceptionally well on a misty morning on a cold stream. The imitation of the BWO nymph was spot-on, and I caught several trout using it. It’s a reliable pattern for cloudy days.
Abigail Lawrence –
I’ve used this nymph on several technical streams and it consistently performs well when the water is cool and overcast. The detail in the pattern matches the natural nymph closely.
Ruth Morrison –
Caught a big trout on this pattern during a morning with low visibility. The fly stayed natural in the current and didn’t float or sink oddly. A must-have for BWO season.