Hydropsychidae

Hydropsychidae is a family of caddisflies, commonly known as net-spinning caddisflies. These insects are found worldwide in freshwater environments, from fast-flowing mountain streams to slower rivers and lakes. Their larvae are characterized by the presence of spinnerets on their labium, which they use to construct silken nets or retreats. These nets are often attached to rocks, logs, or other submerged substrates and are used to capture drifting food particles.

The larvae of Hydropsychidae are primarily filter feeders or detritivores. They feed on organic matter, algae, and small invertebrates that are swept into their nets by the water current. The adults are winged insects that typically emerge from their larval cases in the spring or summer. They are relatively short-lived and are primarily focused on reproduction. Adults are often attracted to lights at night.

Hydropsychidae are considered important indicators of water quality. Their presence and abundance can reflect the health of aquatic ecosystems. Due to their sensitivity to pollution, they are often studied in biomonitoring programs. The family contains a large number of genera and species, making it one of the most diverse families within the order Trichoptera.