Eastern Dobsonfly

Near fast-flowing freshwater streams and rivers where the larvae, known as hellgrammites, develop underwater.

Adults may occasionally consume nectar or fruit juices but often do not eat at all; larvae (hellgrammites) are fierce predators of aquatic insects.

Active primarily at night and strongly attracted to lights; they have a short adult lifespan of only a few days focused on reproduction.

They are harmless to humans, though females and larvae can give a painful bite if handled. They are vital indicators of high water quality and serve as a food source for fish and other wildlife.