RIO’s Morrish May Day – PMD
After 40 years of observing mayfly duns on the water and comparing them to the flies we imitate them with, I had a simple but somewhat profound revelation. Duns sit on the water not in the water. Their bodies don’t touch the water and their tails are nowhere near the surface. When fish look up at duns, there is nothing more than a light semi-round impression of the insect, and that impression is far smaller than the impression of a typical parachute-style fly with a tail that supports it. Most duns we fish have an imprint more like a spinner, and that just isn’t right. This fly addresses these shortcomings and has a small light footprint complimented by a strong buoyant wing profile. Try it, it works really well.
Specifications
| Feature | Detail |
|---|---|
| Pattern Type | Mayfly Dun Imitation |
| Design Principle | Light semi-round imprint, minimal tail contact |
| Flight Profile | Strong buoyant wing profile |
| Target Use | Imitating natural mayfly duns in still or slow-moving water |
FAQ
What makes the Morrish May Day different from other mayfly imitations?
It mimics the natural impression of a mayfly dun with a small, light footprint and minimal tail contact, creating a more accurate representation of how duns appear to fish.
Is this fly suitable for use in fast-moving rivers?
It is best suited for still or slow-moving waters where mayfly duns naturally occur. Performance in fast-moving rivers may vary.
Can this fly be used in both dry and wet fly presentations?
This fly is designed for dry fly presentations to imitate mayfly duns on the surface. It is not intended for wet fly use.
Sally Black –
I’ve tried many mayfly patterns, but the Morrish May Day stands out. The way it floats and creates a subtle impression matches what I see in the wild. My trout are more likely to take it, especially in calm waters. A solid choice for accurate imitation.
Vanessa Clark –
This fly works well in still lakes. The light footprint is noticeable and realistic. I noticed a difference in strike rate compared to traditional parachute patterns. Slightly more natural movement.
Brian Avery –
After years of fishing, I finally found a pattern that feels like it’s imitating the real thing. The way it sits on the surface without touching is exactly how duns behave. Highly recommended for serious mayfly anglers.