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Trichoptera - caddisflies

1/2 in.

Caddisflies are small to medium, four-winged, insects that resemble moths in both size and shape. They differ from moths in that most have a fairly dense mat of hairs rather than scales on the body and wing surface. The antennae are very slender and may be much longer than the body, and the wings are held together at an angle (roof-like) over the body. Caddisflies have chewing mouthparts, but the adults do not feed. Metamorphosis is complete.

Caddisfly larvae live in streams and ponds. Many are called rock-rollers, because they cover their bodies with portable cases made of small stones, and other materials webbed together with silk. This casemaking habit gives the order its common name, since the word caddis means "case." The adults are found near streams, ponds, or lakes in which the larvae live but may be attracted to lights in large numbers. Caddisfly larvae and adults are important food for fish.