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Emergence Triggers
Water Temp
50–58°F
Flow
Dropping limb of runoff
Light
Cloudy afternoons, evenings
Water Type
Medium riffles, moderate gradient
Lifecycle
How Trout Eat It — Stage by Stage
1
Nymph
2 weeks pre-hatch
Chunky crawler nymphs migrate before emergence. Fish a heavy olive nymph tight to the bottom.
Match It
Drake Nymph#10-12
$3.25Poxyback Drake#12
$3.502
Emerger
Hatch onset
Emergence is slow and vulnerable — big fish eat emergers with violent, confident takes.
Match It
Drake Cripple#10-12
$3.503
Dun
Afternoon-evening
No subtlety required. Big foam or hair-wing drakes get eaten even in fast water.
Match It
Green Drake Wulff#10-12
$3.75Hairwing Drake#10
$3.754
Spinner
Dusk
Less important than the dun — but a big rusty spinner picks off stragglers at dark.
Match It
Drake Spinner#10-12
$3.25Cross-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
