In short, the caddis worm builds with more or less everything that comes from the plant or the dead mollusk.
The caddis worm does not forget its talents; but it lacks choice pieces.
A few hours later, having recovered from the shock of losing its sheath, the caddis worm sets to work to manufacture a new one.
To lighten the weight, the caddis worm must first rise to the surface.
There is another matter wherein the caddis worm deserves our attention.
To dive down again, the caddis worm has only to retreat entirely into its sheath.
But only too often the caddis worm dashes ahead, regardless of proportion.
However, tacking on the surface of the water affords the caddis worm no pleasure.
After a couple of minutes in the free air, I replace the caddis worm in the water.
The backward movement which brings the caddis worm home also brings the bit of twig to the edge of the tube.