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BIOLOGY

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Caddisflies are aquatic as larvae. Most larvae live within cases which they construct using a waterproof cement and bits of debris, including sand, pebbles, small pieces of wood, leaves and even minute algal cells. Some species are predatory, but most feed on bits of algae and organic matter. They are holometabolous. Adults are weak flyers and remain near water. Larval cases are constructed of debris, such as tiny sticks and sand or pebbles and are bound together with a strong glue or silk. Larval cases may be collected from stones or vegetation.

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