Yellow Sally
Isoperla spp.
Description
The Yellow Sally (Isoperla) is the "working man's stonefly." While the Salmonfly and Golden Stone get the magazine covers, the Yellow Sally provides the consistent, daily fishing through the dog days of summer. They are small (#14-18), bright yellow, and incredibly abundant. For many western rivers, they are the most numerous stonefly species present.
Life Cycle Stages
Nymph
Recommended Fly Patterns
Emergence
Adult
Recommended Fly Patterns
Habitat
Yellow Sallies love fast, highly oxygenated riffles and runs. They are found in almost every freestone river and many tailwaters. They thrive in the "trout water"—the choppy, bubbly currents where rainbow and cutthroat trout hold in summer.
Behavior
Yellow Sallies are widely active from late morning through the evening.
- Egg Laying: Females fly close to the water, often dipping aggressively. Their bright color makes them easy to track.
- Erratic Flight: They are poor fliers, often looking like they are struggling in the air.
- Selective Trout: Despite their small size, fish can get selective on Sallies, ignoring larger dries.
Fishing Information
Seasonality Late June through August. The "Summer Stone."
Tactics
- The Red Tag: Ensure your dry fly (and even nymph) has a red butt. It makes a difference.
- Dead Drift: Unlike the skittering large stones, dead drifting a Sally pattern in the riffles is usually best.
- Tandem Rigs: A Yellow Sally is an excellent dropper behind a larger Golden Stone or Hopper.
- Nymphing: A small, yellow stonefly nymph is deadly in fast pocket water.
Recommended Patterns
- Nymph: Iron Sally, Little Yellow Sloan, Kyle's Yellow Sally.
- Adult: Yellow Sally Stimulator, Parachute Humpy (Yellow with red butt),
- Specific: "The Red Butt Sally".
Conservation Status
Abundant and stable. They are less sensitive than Pteronarcys but still require clean, cold water.
