Eastern Dobsonfly (Female)

Natural Habitat

Near clean, fast-moving freshwater streams and rivers. They are often attracted to porch lights at night.

Diet & Feeding

Adults may feed on nectar or not eat at all; larvae (hellgrammites) are predatory, eating aquatic insects and small fish.

Behavior Patterns

Adults are nocturnal and short-lived. Females lay eggs on rocks or leaves overhanging water. Larvae spend several years underwater before pupating on land.

Risks & Benefits

Benefits: Larvae are indicators of good water quality and popular fish bait. Risks: Females (pictured) have strong mandibles and can deliver a painful bite if handled; they are not venomous.

Identified on: 6/25/2026