Description:

Adult caddisflies resemble small moths with wings held tent-like over their back when at rest. They have long hair-like antennae. Most species are small (usually 1/4 inch or less) and are dull colored. However, some species are more brightly colored. Immature stages or larvae superficially resemble hairless caterpillars. They often have elongated fleshy gills on the underside of the abdomen. Most larvae have a pair of hooks on the (anal) prolegs on the last abdominal segment. Many of them fashion cases of plant material, sand, pebbles or debris in which they live. The larvae of caddisflies can be distinguished by the claws on the thoracic legs and the anal prolegs.

Life Cycle:

Adult caddisflies are short lived and spend most of their time mating or laying eggs. Females lay eggs on the edge of the water or by females dipping their abdomen into the surface of the water. Caddisfly larvae develop through four stages (instars) over several months or even a year. Pupation is almost always aquatic. There is usually one generation per year.

Pest Status:

No damage, generally innocuous; adults are attracted to lights and occasionally abundant enough to be noticed; immature stages are aquatic, where they are important part of the diet of fish;

Control:

No control necessary. Not considered a pest.