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.

Hatching NowPale Morning Dun Green Drake Trico Sulphur Small Western Red Quill Flav Gray Drake Callibaetis Spotted Sedge Golden Stone Yellow Sally Brown Drake Pink Lady Terrestrials Scuds & Sowbugs

Encyclopedia Hatch Calendar River Fingerprints Match the Hatch Bug School

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Caddisfly

Hatching Now

Spotted Sedge

Hydropsyche cockerelli

The workhorse summer caddis. Net-spinning larvae are a top trout food year-round, and tan adults own the last hour of light all summer.

Order

Caddisfly

Family

Hydropsychidae

Genus

Hydropsyche

Hook

#14-16

Season · Peak Jun-Sep evenings

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Spotted Sedge

Emergence Triggers

Water Temp

55–68°F

Flow

Summer base flows

Light

Last two hours of light

Water Type

Riffles, pocket water

Lifecycle

How Trout Eat It — Stage by Stage

Larva

Year-round

Net-spinning larvae build silk retreats on rocks and drift heavily whenever flows bump them loose — a green caddis larva is a top-three searching nymph on any Western river.

Match It

Green Rock Worm#14-16

$2.75

Czech Caddis#14

$3.15

Pupa

Dusk

Swing soft-hackles down-and-across at sunset. Strikes come on the lift — hold on.

Match It

Sparkle Pupa#14-16

$2.95

Soft Hackle Hare's Ear#14