I have a lot of dragonflies around my ponds, mostly red and blue ones. I found one of the larvae one time and it was pretty darn gross. I think I was in the pond and it crawled on me, it was a long time ago. Ever since, I've been kind of leery of their larvae. I also think the stage that is crawling around in the water is when they eat small fish. They are predators. I think it looked kind of like an underwater potato bug, really gross. Personally, I'd rather they go and breed somewhere else but I don't go looking for them to get rid of them.
