It's simple, but it's the most practical and efficient way I've found for dealing with multiple-eyed animals. Because the movement of the clear plastic will not be known easily by him. The trick is simple, plastic we tie on a small long wood and given the front room for us to confine the insects we want to catch.
So when there is a dragonfly, we just direct this malo face from the top of the dragonfly, or the front also will not make the dragonflies or belalng it go. The important thing is slow and not ekstreem movement. Nhaa after close live "screw ..." catch the dragonfly and press down to keep it off. Here's an example, I managed to catch a dragonfly: