
Community identification
Eastern Dobsonfly (Female)
Corydalus cornutus
- Order & Family
- Megaloptera: Corydalidae
- Size
- 2 to 5 inches (50 to 125 mm) in length wing-span.
Natural Habitat
Found near clean, fast-moving freshwater streams and rivers where larvae (hellgrammites) develop.
Diet & Feeding
Adults may drink nectar or water but often do not eat; larvae are fierce aquatic predators of soft-bodied insects.
Behavior Patterns
Adults are nocturnal and attracted to bright lights. Females possess short, powerful mandibles for defense, unlike the long, tusklike mandibles of males.
Risks & Benefits
Benefits: Larvae are indicators of good water quality and are prized as fish bait. Risks: Females can deliver a painful bite if handled, though they are not venomous.