A monster with a body of green glass beads

Joan Rawlins Biggar, Mystery at Camp Galena, Concordia Publishing House, 1997, p. 31.

« That’s a caddis fly larva, » the teacher said. « That kind spins a silk thread to anchor it to the rock. Other kinds of caddis flies collect bits of sand and gravel, or evergreen needles, and cement them around themselves to make traveling houses to hide in. »

Megan dropped her find into one of the magnifiers. Under the eyepiece, her caddis fly larva became a monster with a body of green glass beads and a brown bead head with wicked-looking pincers. It grabbed a smaller, twin-tailed insect in its pincers. The small one twisted and fough back.