George Edward Hyde, Pond Life, Hulton Educational Publications, (1968), 1971.
Caddis-flies also rest on water plants. They fold their wings like some moths. There are many differents kinds, and some measure five centimeters across the wings. The larvae are often called CADDIS-WORMS. They are not really worms, but live in water.
They make neat little cases of grains of sand, or bits of dead plants. The larvae shelter inside the cases, and only their heads and legs can be seen.