TroutWindowEphemeroptera · Heptageniidae
Light Cahill
Pale evening mayfly that shows up from late spring into fall dusk notes. A versatile pale dry when sulphurs fade.
Taxa: Stenacron / Stenonema complex (angler Light Cahill)
Pale duns at dusk + fish looking up = go, especially when bigger hatches have tapered.
Life stages
Mayfly path. Pale cream/yellow duns; dusk activity called out on the SE calendar.
When it matters in the Southern Apps (NC–VA)
May–Jun presence; Sep dusk note on the SE calendar. Useful pale dry whenever pale duns are on.
Matching artificials & techniques
Mimic the stage the fish are eating — size and silhouette first. Patterns are common SE shop language, not a brand list.
Light Cahill nymph, Hare’s Ear
Standard nymph drifts in freestone runs.
Light Cahill dry, pale Comparadun
Dusk presentations; match pale body.
Sources: Heptageniidae Cahill complex; SE calendar dusk note. Stage photos: Coming soon (Epeorus / illustration stand-ins removed). Regional note: Taxonomy and stage language follow standard aquatic entomology (Ephemeroptera / Trichoptera / Plecoptera / Chironomidae). SE timing is a regional prior from the hatch calendar — confirm with thermometer, seine, and local shop/agency charts.
SE hatch calendar All bugs Life-cycle basics
More in the guide: BWO · Midges · Caddis · October Caddis · Sulphurs · Tricos