Waterlands
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 DunGreen DrakeTricoSulphurSmall Western Red QuillFlavGray DrakeCallibaetisSpotted SedgeGolden StoneYellow SallyBrown DrakePink LadyTerrestrialsScuds & Sowbugs
EncyclopediaHatch CalendarRiver FingerprintsMatch the HatchBug School
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Other Food

Baitfish & Sculpin

Cottus spp. and forage minnows

What the biggest fish in the river actually eat. Sculpin hug the bottom and forage minnows school in soft water; a streamer is how you fish for one large trout instead of many small ones.

Order
Other Food
Family
Cottidae, Cyprinidae
Genus
Various
Hook
#2-10
Season · Peak Spring and fall
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Baitfish & Sculpin
Emergence Triggers
Water Temp
38–62°F
Flow
Higher, pushy, or off-color water
Light
Low light — dawn, dusk, heavy overcast
Water Type
Banks, drop-offs, deep structure
Lifecycle
How Trout Eat It — Stage by Stage
1
Adult
Year-round; best spring and fall

Cast to the bank, get deep fast, and strip with pauses. Follows that do not commit usually mean you are stripping too fast, not that the fly is wrong.

Match It
Woolly Bugger#4-10
$3.50
Sculpzilla#4-8
$4.95
Cross-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