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The Sulphur Dun is the Eastern equivalent to the Pale Morning Dun of the West. Sulphurs usually hatch in the evening, (although they can hatch mid-day on cloudy days) early in the season, with prolific numbers of mayflies hatching at a time. If this pattern doesn’t produce, trail a PMD Emerger (available in our nymph store) behind a dry fly.Tied in sizes 14 to 20
