Solitude Flies Harrop’s CDC Thorax Mayfly Dry Fly
A Rene Harrop fly pattern featuring a thin, realistic biot body, CDC post, and a hackled wing cut flush with the bottom of the fly. This low-riding mayfly dun pattern is designed to sit naturally in the water, allowing the body silhouette to be clearly visible. It works especially well for picky trout and effectively imitates PMDs, Green Drakes, and other mayfly stages.
- Slim bodied mayfly dry
- Sold individually
| Feature | Detail |
|---|---|
| Pattern Type | Dun mayfly |
| Body Material | Biot |
| Post Material | CDC |
| Wing Construction | Flush hackle |
| Target Species | Picky trout |
FAQ
What makes the Harrop’s CDC Thorax different from other mayfly patterns?
The Harrop’s CDC Thorax features a thin biot body and a flush-cut hackled wing that allows the fly to sit low in the water, making the body silhouette visible to trout. This design is especially effective for picky trout that require a realistic presentation.
Is this fly suitable for dry fly fishing in still waters?
Yes, this pattern is designed for dry fly fishing and works well in still or slow-moving waters where trout are selective about their food presentation.
Can this fly be used for imitating other mayfly stages?
Yes, it effectively imitates PMDs and Green Drakes due to its realistic body and wing profile.



David Brown –
This fly performs well in clear water conditions. The low profile and realistic body make it easy to see under the surface, which helps when targeting cautious trout. I’ve used it successfully in both morning and afternoon fishing sessions.
Zoe Wilson –
The CDC thorax has a natural look and stays in place well. It’s a bit delicate, so I handle it carefully, but the results are consistent when the water is still and the light is right.
Warren Newman –
I’ve tried several mayfly patterns, and this one stands out for its realistic silhouette. It’s especially effective when fishing near the surface in early spring when trout are active.