Dry Flies
Blue Dun
One of the oldest and most storied dry fly patterns in the history of fly fishing, dating back centuries in British angling tradition. The Blue Dun imitates the slate-winged olive duns that hatch prolifically on freestone streams during spring and fall, and remains a staple searching pattern when small mayflies are on the water.
Frequently Asked Questions
What size Blue Dun should I use?
The Blue 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 Blue Dun imitate?
The Blue Dun primarily imitates blue-winged olives, baetis duns, small mayfly duns.
Pattern Details
- Category
- Dry Flies
- Sizes
- #14–#18
- Colors
- dun/gray, olive-gray
- Weight
- unweighted
- Hook Styles
- standard dry
- Imitates
- blue-winged olives, baetis duns, small mayfly duns
- Water Types
- freestone rivers, spring creeks, tailwaters
Target Species
rainbow troutbrown troutbrook trout
Pattern Details
- Category
- Dry Flies
- Sizes
- #14–#18
- Colors
- dun/gray, olive-gray
- Weight
- unweighted
- Hook Styles
- standard dry
- Imitates
- blue-winged olives, baetis duns, small mayfly duns
- Water Types
- freestone rivers, spring creeks, tailwaters
Target Species
rainbow troutbrown troutbrook trout