Dry Flies
Sulphur Dun
The Sulphur Dun imitates Ephemerella dorothea and E. invaria, the signature evening hatch on eastern and midwestern rivers. A creamy yellow body with light dun wings matches the delicate profile of these iconic mayflies during summer twilight feeding frenzies.
Frequently Asked Questions
What size Sulphur Dun should I use?
The Sulphur Dun is most commonly tied in sizes 14–18. Choose smaller sizes for clear water and pressured fish, and larger sizes for faster or off-color water.
What does a Sulphur Dun imitate?
The Sulphur Dun primarily imitates Sulphur mayflies, Ephemerella dorothea.
Pattern Details
- Category
- Dry Flies
- Sizes
- 14–18
- Colors
- Sulphur yellow, Cream
- Imitates
- Sulphur mayflies, Ephemerella dorothea
- Water Types
- freestone, spring creek
Target Species
rainbow troutbrown troutbrook troutcutthroat trout
Pattern Details
- Category
- Dry Flies
- Sizes
- 14–18
- Colors
- Sulphur yellow, Cream
- Imitates
- Sulphur mayflies, Ephemerella dorothea
- Water Types
- freestone, spring creek
Target Species
rainbow troutbrown troutbrook troutcutthroat trout