Obviously, the more specific one can be as to the location, the more valuable the data is. Five basic pieces of field equipment are needed. A good insect net for Odonata will have a diameter of at least 18 inches, an open mesh net, and a handle at least 4 feet long. A bigger net is harder to fly around and requires a less accurate swing from the collector. A finer mesh is needed for damselflies, however.
Experts are somewhat divided on the best way to effect the capture.
The net, in this case, is coming up from behind the dragonfly, which is then less likely to see it. Place the net on the ground and locate the specimen in the net. Use one hand to hold the net around the specimen so that it is immobilized, and reach through the rim with the other hand to claim your prize. When your hand reaches the dragonfly, fold the wings over its back and hold the dragonfly by the wings at their base. Now, withdraw your hand from the net and slide the specimen into the collecting envelope.