What is an "alderfly"?

An alderfly is an insect belonging to the order Megaloptera. It is typically found near freshwater habitats such as rivers and streams. The alderfly has an elongated body, slender antennae, and large wings with a lace-like appearance. It is known for its distinctive long, filamentous mouthparts that it uses to feed on nectar and other plant fluids. The alderfly larvae are aquatic and live in the water, where they prey on small invertebrates. This insect plays a role in freshwater ecosystems as both a predator and an indicator of water quality.