Laurence E. Palmer, « The School Page », Nature magazine: an illustrated monthly with popular articles, vol 31, Washington, American Nature Association, 1938, p. 500.

See how caddis fly larvae conceal themselves in little houses that they make of available materials. Remove a caddis worm from its case and put it in aquarium with different colored strips of cellophan. Does it use any selection of materials in reconstructing its house? Actual and effective defense in brought about by some aquatic insects that fight for..