Typically living under rocks in flowing rivers and streams, hellgrammite larvae feed on small, soft-bodied insects. … While hellgrammites are not aggressive, bites from these larvae often pierce the skin and cause very minor bleeding.

What happens when a Dobsonfly bites you?

While their large mandibles might seem terrifying, Dobsonflies are harmless to humans, as they do not cause any structural damage, bite or sting, or even transmit diseases. The females are able to bite, but these cases are very rare, and their bite has no lasting effects.

Does Megaloptera bite?

Megaloptera- the dobsonflies. Habitat & Habits: Megaloptera larvae are common in streams and rivers, especially in riffle areas. … Feeding: Larvae are voracious predators and (WARNING) will bite humans. Adults probably do not feed.