Stonefly

Scientific Name: Plecoptera

Order & Family: Order: Plecoptera, Family: Perlidae (Common Stoneflies)

Size: 5 mm to 65 mm (0.2 to 2.5 inches) depending on the species

Stonefly

Natural Habitat

Near clean, well-oxygenated freshwater streams and rivers. Nymphs live under submerged rocks.

Diet & Feeding

Nymphs are either carnivorous (eating other small aquatic insects) or detritivorous. Adults rarely eat or consume algae/lichen.

Behavior Patterns

Adults are relatively short-lived and weak fliers, often found resting on foliage or structures near water. They have a hemimetabolous (incomplete) life cycle.

Risks & Benefits

Harmless to humans. They are vital indicators of high water quality and serve as a primary food source for trout and other wildlife.

Identified on: 4/28/2026