Caddisfly larva (case-making)

Natural Habitat

Aquatic; freshwater streams, rivers, ponds, and lakes. Larvae build cases from materials found in their environment, such as sand grains, pebbles, twigs, or plant fragments.

Diet & Feeding

Highly varied depending on the species. Many are detritivores (feeding on decaying organic matter), some are herbivores (grazing on algae or consuming plant material), and others are predators (feeding on smaller aquatic insects).

Behavior Patterns

Caddisfly larvae are well-known for constructing protective cases around their bodies. These cases are unique to each species and are built from silk secreted by the larva, to which they attach natural materials. They use their cases for protection from predators and strong currents. They breathe through gills located on their abdomen. Adults are typically nocturnal moths that live near water.

Risks & Benefits

Benefits: Caddisfly larvae are important indicators of water quality, as different species have varying tolerances to pollution. They are a significant food source for fish and other aquatic animals, playing a crucial role in freshwater ecosystems. Risks: No direct risks to humans; they do not bite or sting. Some species can be a nuisance if abundant in aquaculture settings.

Identified on: 9/9/2025