The caddisfly lives only a short time as an adult but may spend several years as a larva. Many larvae can do something few aquatic insects can, they build their own shelter. Some species build homes of leaves or twigs; others use tiny stones, while others are free-living. A few types of caddisfly build a pebble house attached to a larger rock. Different kinds of caddisflies build different types of homes. Some caddisflies like to live in temporary stagnant ponds while other types will only live in swift streams. All caddisflies eat plants but some catch tiny bits of plants by building a net to trap food as it drifts past. The caddisflies are very important food for fish, especially trout.
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