The Riverfly Partnership is a network of organisations working together to protect and conserve the river environment. These organisations represent anglers, conservationists, entomologists, scientists, water course managers and relevant authorities. This UK-wide initiative provides a simple monitoring technique that counts the abundance of freshwater invertebrate animals to detect changes in the quality of river water. Using volunteers, the project helps to expand environmental monitoring capability and can act as a deterrent to would be polluters with the regular presence of regular volunteer sampling. John Clayton, a Senior Ecologist at the Scottish Environment Protection Agency (SEPA), tells us more.