The mayfly is an aquatic insect belonging to the order Ephemeroptera. They are known for their short adult lifespan, which can range from a few hours to a few days. Mayflies are often found near freshwater bodies like rivers and lakes, where they spend most of their lives as nymphs underwater. As adults, mayflies are characterized by their delicate bodies and large, membranous wings. They play a crucial role in the ecosystem, serving as food for various animals, including fish and birds. Their unique life cycle includes a stage called the subimago, which is a transitional phase before they become fully mature adults.