TIPS & TRICKS  ·  WATER READING

The Bug Hunt

Flip one rock in a riffle and the stream tells you exactly what fly to tie on. No Latin required - just match the shape.

THE TIP

Flip a Rock. Match the Shape.

Joe anchors every fly choice in what the trout are actually eating - and the menu is printed on the underside of the rocks. What you find under a rock is what’s drifting past the fish, and what’s drifting past the fish is what your fly should imitate. Observation before action, in its purest form.

1
Go to a riffle and lift a rock. Fast, shallow, broken water is the insect factory of the stream. Pick up a fist-sized rock from the bottom and turn it over slowly.
2
Mayfly nymph: 2-3 tails, gills along the belly. The classic trout food. Match it with a Pheasant Tail or Hare’s Ear.
3
Stonefly nymph: 2 tails, flat body, 2 claws per leg. Stoneflies only live in clean, fast, oxygen-rich water - finding one is a water-quality report card. Match it with a black or golden stone nymph.
4
Caddis: no tails, builds a case. Caddis larvae glue together little cases of sticks and pebbles - look for what seems like a tiny moving twig bundle. Match it with a caddis pupa or soft hackle.
5
Put the rock back. Tie on what you found. Return the rock the way it was - it’s someone’s home. The bug in your hand just picked your fly for you.

JOE SAYS

“As a boy, Joe noticed trout eating tiny gray-orange freshwater shrimp - so he tied a fox-fur shrimp on a size 18 hook to match it before he ever cast, while everyone else threw streamers. Observation before action.”

- Joe’s origin story, told at every rock-flipping station

PRACTICE THIS

Five Minutes. Today.

THE 5-MINUTE DRILL

This week, flip three rocks in any stream (gently, and put each one back). For every bug you find, name it by shape: tails or no tails? gills on the belly? a case? Sketch one on paper - drawing it locks in the ID. Bonus: count the tails. Three tails plus belly gills says mayfly almost every time.

Get the printable homework sheets →

Send This to Someone Who Needs It

Every tip page is free to share - post it, text it, print it for your troop or class. It all links back into the free Stream School.

GO DEEPER

The Bug Hunt Is Week 6 of Minnow School

Bug hunting, observation, and a first fish worth celebrating - the capstone of the Minnow School foundation weeks.