Sulphur Dun

The Sulphur Dun dry fly pattern has wings that are not quite dry, imitating a mayfly not quite ready to fly.

Fly Fishing the Sulphur mayfly hatch - The View From Harrys Window

Pale Evening Dun Hatch In Montana, Fly Fishing

Trout Fly available at The Trout Spot in sizes 14 and 16.

Sulphur Dun

Sulphur Dun – Smitty's Fly Box

Eastern Mayfly / Sulphur Flies For Fly Fishing - The Fly Crate

Sulphur Dun Dry Fly Size 14 Trout Flies Grayling Flies Dry Flies

Mayfly Species Ephemerella invaria (Sulphur Dun) hatch & pictures

Sulphur Dun Dry Fly, MUST HAVE For Trout

Sulphur Dun Emerger - The Perfect Fly Store

Strategies for Fishing Sulphur and PMD Hatches - Fly Fisherman