Trichoptera: Caddisflies, Caseflies

(from the Greek: trichos = hair + ptera = wings)Caddisfly

Trichoptera are closely related to Lepidoptera, but have chewing mouthparts and wings that are hairy instead of scaly. In side view they often have a triangular outline, and the antennae are long and thread-like. The larvae also differ: caddisfly larvae, unlike butterfly and moth caterpillars, never have abdominal legs withcrochets (groups of hooked spines at the end of abdominal legs). Trichoptera have complete metamorphosis, and all caddisfly larvae are fully aquatic. The larvae of many species construct cases around themselves with saliva and bits of twigs, reeds, or sand. This gives them their other common name; “caseflies.” Some construct webbed nets, but no case.Caddisfly

Trichoptera are the largest single group of aquatic insects and are an important source of food for fish. The adults, most of which are ½- 1 ½ inches, tend to fly at night and are attracted to lights.