Ephemeroptera (mayflies)

Ephemeroptera, commonly known as mayflies, are aquatic insects known for their short adult lifespan, often lasting just a day or two. They undergo a three-stage life cycle: egg, nymph (or naiads), and adult. Nymphs live underwater for several months to years, developing in streams and lakes. Adult mayflies emerge, typically in large swarms, to mate and lay eggs, ensuring their populations continue. They play a vital role in freshwater ecosystems, serving as food for many fish and other wildlife, and are also used as indicators of water quality due to their sensitivity to pollution.