River Intelligence · Entomology

Read the Water. Match the Hatch.

Every river has an entomological fingerprint — the bugs it grows, when they hatch, and how trout eat them. Learn the bugs, cross-reference live flows, and fill your box before you go.

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Encyclopedia Hatch Calendar River Fingerprints Match the Hatch Bug School

← All Bugs

Mayfly

Blue Quill

Paraleptophlebia debilis

A small slate-winged mayfly that bookends the season alongside the Mahogany Dun. Sparse, but it brings fish up in cold shoulder-season water when little else does.

Order

Mayfly

Family

Leptophlebiidae

Genus

Paraleptophlebia

Hook

#16-18

Season · Peak Apr-May / Sep-Oct

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Blue Quill

Emergence Triggers

Water Temp

46–56°F

Flow

Shoulder-season base flows

Light

Overcast afternoons

Water Type

Soft seams, slow margins

Lifecycle

How Trout Eat It — Stage by Stage

Nymph

Spring and fall

Crawler nymphs work toward slow margins before emergence.

Match It

Pheasant Tail#16-18

$2.75

Dun

Midday-afternoon

Small slate-gray duns ride slow seams — fine tippet and a long drift.

Match It

Parachute Adams#16-18

$2.95

Cross-Reference

Where This Bug Matters

Not yet linked to any Waterlands river.

≋ Waterlands · Hatch data blends USGS gauges, NOAA temps & regional emergence records

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