Stoneflies are freshwater invertebrates and most species live in fast flowing upland freshwater. Nymphs require highly oxygenated and unpolluted water, their presence is therefore an indicator of good water quality. More than 30 different species of stonefly live in Britain, the Predatory Stonefly...
What is National Insect Week?
National Insect Week encourages people of all ages to learn more about insects.
Every two years, the Royal Entomological Society organises the week, supported by a large number of partner organisations with interests in the science, natural history and conservation of insects.