Pale Evening Dun

The Pale Evening Dun (PED) dry fly imitates Ephemerella dorothea dorothea, a common mayfly species found in slower-moving rivers and spring creeks across much of North America. It hatches primarily in late afternoon to evening during late spring and early summer. The dry fly version typically matches the adult dun stage and is most effective during calm, low-light periods when trout are rising steadily to emerging insects. With a slender body and upright wings, this pattern excels in flat water and clear conditions where presentation and accuracy matter.

Spent Dun Drift: Late in the evening, as the hatch wanes, fish may key on crippled or spent duns. Trim the hackle flush on the bottom of your PED dry to make it sit lower in the film—this mimics a struggling adult and draws takes from cautious, larger fish.