Saw half a dozen at a pond today.
They can be imitated with a furled extended body. I like a parachute fly with a deer hair post folded over after wrapping hackle to make a high floatation body.
Do you have a picture?
For damselflies I use mono for the furled tail. Dragonflies might look better with poly yarn. I tightly wrapped over the mono with dubbed thread and cut off end I held on to dub. With colored yarn I’d try to furl it to length I wanted.