One year, I must have brought in blue darner eggs or larvae with the live food, because in mid winter, I had a bunch of electric blue wonders darting around the fishroom for a while. That fishroom was downstairs in the house, so I kept the door closed and just enjoyed them. It was -25 outside, so I couldn't catch and release them.
They had been out of sight in the weeds, and never harmed any fish. Large dragonfly nymphs can, but have never really done much damage here. I have found at least a dozen over the years, and if the season was right and they could be released, took care of them while they developed.
I actually started kayaking when I learned that if you went out to the middle of a northern lake on a calm evening and just drifted, the boat would be covered in a really diverse group of dragonflies, darners and such. It's really beautiful to watch them. Neat creatures.
