Dobsonflies, (larvae are also known as hellgrammites) are insects in the order Megaloptera. They have impressive sexual dimorphism; males have a extremely elongated mandibles, whereas the females do not. I have seen lots of misinformation over the years about these insects. Though they do have a strange appearance (apparently terrifying to some) theyre not harmful whatsoever. In fact, theyre very beneficial predators in aquatic ecosystems. They are what we call an indicator species, meaning that

😎 HELLO hellgrammite! 😳WOW-- this hellgrammite (dobson fly larva) was so big our NW Scenic River Manager Rowan just had to create a reel! 🔎Finding hellgrammites in a stream is a strong indicator of good water quality because they are intolerant of pollution and require clean water and healthy aquatic habitat. 🪰 🪳Did you know that helgrammites can live up to 5 years on the bottom of streams and rivers, hiding under rocks and logs in fast-moving water? 🪰Eventually, they'll crawl out, pupate,