With H. betteni classified as a species of the net-spinning caddisfly, an explanation of that common name is needed. The aquatic larvae of H. betteni are able to release silk through their mouths via special salivary glands. After the larvae hatch, they build a net using the silk, attaching it to rocks located in faster flowing streams/rivers. Smaller plant material, sand, and pebbles are also "woven" into this net to serve as a hiding place for the larvae (Fowler).
    These nets are essentially used to filter out different food particles and small organisms from the running water in which the larvae can feed on. The contents that the larvae then feed on consist of small plants, algae, immature aquatic insects, diatoms, and a few other smaller food particles (Fowler).
    As the larvae increases in size, it constructs the net to a larger size as well. Eventually the larvae become fully grown, which leads to the next stage in its life (see Reproduction/Life Cycle).

                            Caddisfly Larvae net

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