Mayfly Nymph

Mayflies are insects which belong to the Order Ephemeroptera. They have been placed into an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. They are aquatic insects whose immature stage (called "naiad" or "nymph") usually lasts one year in freshwater. The adults are short-lived, from a few minutes to a few days depending on the species.