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Emergence Triggers
Water Temp
54–62°F
Flow
Post-runoff, stable
Light
Evenings, cloudy afternoons
Water Type
Weedy runs, smooth currents
Lifecycle
How Trout Eat It — Stage by Stage
1
Nymph
Jun-Jul
Robust crawler nymphs get active in the evenings — an olive nymph fished shallow near weed edges.
Match It
Olive Hare's Ear#14-16
$2.75Poxyback Flav#14
$3.252
Emerger
Hatch onset
Like all Drunella, flavs emerge slowly and get stuck often — cripples draw the confident eats.
Match It
Flav Cripple#14-16
$3.253
Dun
Evenings
Olive duns on smooth evening water — the Henry’s Fork classic after the drake circus leaves.
Match It
Flav Sparkle Dun#14-16
$3.15Parachute Flav#14
$3.254
Spinner
Dusk
Olive-bodied spinners over riffle tailouts at dark.
Match It
Flav Spinner#14-16
$2.95Cross-Reference
Where This Bug Matters
≋ Waterlands · Hatch data blends USGS gauges, NOAA temps & regional emergence records
USGS Real-time Data · Free to Start · No Credit Card
