Stonefly

Natural Habitat

Nymphs live in clean, well-oxygenated freshwater, typically under rocks or debris in streams and rivers. Adults are often found near these aquatic environments.

Diet & Feeding

Nymphs are primarily herbivores (feeding on algae and detritus) or predators (feeding on smaller aquatic insects). Adult stoneflies generally do not feed or feed on algae/lichens.

Behavior Patterns

Nymphs are aquatic and undergo incomplete metamorphosis, shedding their exoskeleton multiple times. Adults are short-lived, often existing only for a few days to a few weeks, primarily for reproduction. They are typically weak fliers and nocturnal.

Risks & Benefits

Stoneflies are important bioindicators of water quality, as their presence indicates clean, unpolluted water. They are a significant food source for fish and other aquatic organisms. There are no known risks to humans.

Identified on: 11/15/2025