Alderfly

Alderflies are a group of insects belonging to the order Neuroptera, though they are sometimes placed in their own order, Raphidioptera. There are two extant families: the Alder-fly family (Sialidae) and the Snakefly family (Raphidiidae). Alderflies are found worldwide, with the exception of the polar regions.

Alderflies are characterized by their relatively long, narrow bodies and two pairs of equally veined, membranous wings. They are generally dull-colored, with brown or black being common. The larvae of alderflies are aquatic and carnivorous, typically found in freshwater environments such as streams, rivers, and lakes. They possess chewing mouthparts and are predators of other small aquatic invertebrates. The larval stage can last for several years, during which they molt multiple times.

Adult alderflies are also predatory, feeding on small insects, and are often found near water bodies where their larvae develop. They are typically weak fliers and are not considered pests. The life cycle involves complete metamorphosis, with the egg, larval, pupal, and adult stages. The pupal stage usually occurs in a burrow in moist soil or decaying wood near the water. Alderflies play a role in their ecosystems as both predators and prey.