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08.11.10 News
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Picture of the Day

Caddisfly Larva

A caddisfly larva. The larva builds and carries its own underwater shelter case using ribbons of natural sticky silk to stitch together grains of sand and rock (see right rear of photo). But when placed in a lab aquarium with glass beads instead of sand grains, the larva uses its wet silk to add beads to its shelter case (see center of photo).
Image credit: Fred Hayes for the University of Utah