Small dry
Yellow May Dun
Conspicuous riffle dun
Trout · GraylingSurface
Bright sulphur-yellow Heptageniid dun of summer riffles — duns ride the current conspicuously.
Fish this when
Bright summer afternoons on faster, riffled water, when Yellow May Duns hatch and ride the current unusually long before taking flight.
Why it works
The bold sulphur-yellow body matches a natural that's already conspicuous against broken water, so a slightly bright profile draws fish rather than looking suspicious.
Naturals it imitates
Yellow May dun (Heptagenia sulphurea)
Typical zone & fishable range
usually
Surface
Film
Subsurface
Deep
Setup sensitivity: medium
Quick facts
Tying difficulty
Intermediate