The Blue Dun mayfly hatches from May until June and the hatches are most intense on warm overcast days. When the hatch is on, cast one of these flies upstream of a rising trout and maintain a dead drift over the fish.
|Hook:|| ||Standard Dry Fly Hook|
|Thread:|| ||Grey or Black|
|Tail:|| ||Medium Blue Dun Hackle Fibers|
|Body:|| ||Grey Dry Fly Dubbing|
|Wings:|| ||Natural Mallard or Duck Quill Segments, Upright and Divided|
|Hackle:|| ||Medium Blue Dun|