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Technical reviewed side profile illustration of Sulphur Comparadun showing upright fan-shaped hair wing, split tails, low hackleless body, Sulphur-specific body toneIllustrated reference

Dry · guide 38

Sulphur Comparadun

A pale orange-yellow, hackleless Comparadun tied specifically for Sulphur mayfly duns.

Common size
Often #14–18; verify locally
Common colors
pale orange, yellow-cream, dun wing
Imitates
Sulphur mayfly dun, low-riding pale mayfly adult
How to recognize it

The fan-shaped upright deer-hair wing, split tail, low hackleless body, and Sulphur-specific color define this destination. A PMD Comparadun is related but not interchangeable by name.

Technical reviewed side profile illustration of Sulphur Comparadun showing upright fan-shaped hair wing, split tails, low hackleless body, Sulphur-specific body tone
Illustrated reference

Sulphur Comparadun reviewed side profile

A schematic profile emphasizing upright fan-shaped hair wing and split tails.

View
reviewed side profile
Color shown
pale orange-yellow body and dun hair wing
Look for
upright fan-shaped hair wing; split tails; low hackleless body; Sulphur-specific body tone
Open full-size image ↗

On the water

Know when and how to fish it.

Use these tips as a starting point. The river, depth, insects, and fish behavior still decide the final presentation.

01

When to use it

  • During Sulphur dun activity.
  • When fish reject a higher-riding hackled dry.
02

How to fish it

  • Dead-drift low in the film.
  • Match local Sulphur size and tone.
03

Mistakes to avoid

  • Relabeling a PMD-colored fly without checking tone.
  • Calling a trailing-shuck Sparkle Dun a Comparadun.

Common variations

Small changes can make a different fly.

Three reviewed technical illustrations show the identifying profile, construction, and fishing orientation. They are schematic field-guide aids, not photographs.

Reviewed core form

The fan-shaped upright deer-hair wing, split tail, low hackleless body, and Sulphur-specific color define this destination. A PMD Comparadun is related but not interchangeable by name.
Colors shown
pale orange, yellow-cream, dun wing
Weighting
Weighting is identified when it defines the reviewed form; other bead or weight choices remain labeled variants.

Related patterns

PMD Comparadun ↗Sparkle Dun ↗Sulphur Mayfly Patterns ↗

How this guide was checked

Fly information and photo sources.

Guide checked on 2026-07-12. Every image has its own source and usage record. Natural insects and hand-tied flies can vary in shape and proportion.

Pattern sources

Fly Fishers InternationalFly of the Month: Comparadun↗Orvis NewsPhil's Top 6 Patterns for Spring Mayfly Hatches↗

Image credits