Small dry
CDC Dark Olive
Spring/autumn Baetis dun
Trout · GraylingSurface
CDC dark-olive dun for the Baetis hatches of spring and autumn — the bread-and-butter river olive.
Fish this when
Cool, overcast days in spring and autumn when Large or Medium Dark Olives are the only bugs moving, on both riffles and slower runs.
Why it works
The dark CDC wing and body read correctly against the low, flat light of early- and late-season hatches, when a paler summer olive pattern looks noticeably wrong.
Naturals it imitates
Large/Medium Dark Olive dun (Baetis)
Typical zone & fishable range
usually
Surface
Film
Subsurface
Deep
Setup sensitivity: medium
Quick facts
Tying difficulty
Intermediate