Stonefly Search

Join us as our staff and volunteers track winter stonefly populations along the Clinton River and its tributaries. This fun and educational event is free, family-friendly, and open to the public - no experience required!

Stoneflies have natural anti-freeze in their blood and are able to remain active in the winter months. Reproducing in the winter allows them to avoid many predators and increases their chance of surviving into adulthood.

Stonefly nymphs are extremely sensitive to water pollution and develop in cool, well-oxygenated water. The presence of stoneflies is an indicator of good water quality, and their absence in areas where they previously occurred may indicate pollution.