The Sulphur Dun dry fly pattern has wings that are not quite dry, imitating a mayfly not quite ready to fly.
Sulphur Sparkle Dun
Olive Sulphur Compara Dun Fly - Fishing Flies with Fish4Flies
Hook Size: 16/18, The Perfect Fly Sulfer Dun Spinner is a imitation of the spinner stage of life of the mayfly. Once the dun reaches the banks, trees
Sulphur Dun Spinner
Sulphur Fly Patterns – Tagged Sulphur – West Branch Angler
Fly Fishing the Sulphur mayfly hatch - The View From Harrys Window
Mayfly Species Ephemerella invaria (Sulphur Dun) hatch & pictures
Dry Fly Fishing: The Stages of the Sulphur Hatch - Fulling Mill Blog
Sulphur Dun - The Fly Shack Fly Fishing
Quill-Body Sulphur Mayfly Duns
Ephemerella dorothea, Sulphur
Sulphur Dun (Ephemerella invaria) · iNaturalist Canada
Rene Harrop's CDC Thorax - Sulphur - 14 - House of Fly
