Sulphur Dun

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

Sulphur Dun (Ephemerella invaria) · iNaturalist Canada

Sulphur Sparkle Dun

Yet another super-buoyant dry fly that will sit down on the film making a tasty meal for the fish when feeding. A hugely effective pattern and one all fishermen should carry as a matter of course.

Sulphur Parachute 18

Sulphur Dun Nymph

Sulphur Hatch - Hawkins Outfitters - Northern Michigan Fly Fishing

Sulphur Dun-Orange

Female Procloeon (Tiny Sulphur Duns) Mayfly Dun Pictures

Sulphur Dun – Risen Fly

DW Sulphur Dun S16 Fishing Fly, Wet Flies

Female Ephemerella invaria (Sulphur Dun) Mayfly Dun Pictures

Sulphur Dun 2 Pack