Dun
Guides
Timpanoga hecuba
Great Red Quill
Timpanoga hecuba, commonly known as the Great Red Quill, is a species of mayfly in the family Ephemerellidae. This Nearctic species is significant in fly fishing, where its adult and subimago (dun) forms are imitated by artificial flies. The species was originally described as Ephemerella hecuba by Eaton in 1884 and later transferred to the genus Timpanoga.