Yellow Sally Stonefly
Isoperla spp.
StoneflyAfternoon
Water-temperature trigger
30°F58–70°Fpeak 64°F80°F
- Duration
- 5 weeks
- Also called
- Little Yellow Stone
Top fly patterns
- Yellow Sally Stimulator #14-16
- Yellow Stonefly Nymph #14
- Yellow Elk Hair Caddis #14
Common on freestone rivers. Adults flutter back to lay eggs on warm afternoons — trout target the egg-laying females.