Dragonflies have two sets of wings that beat 40 times per second. They can fly forwards, backwards, up, and down. Not only that, but they can make a 180 degree turn within ONLY two wing beats!!!
Dragonflies have the best eyesight of any insect. With their twin eyes of 30,000 facets, they can see for a whopping 100 feet!!! And amazingly, their range of vision spans an incredible 350 degrees, almost a complete circle. That explains why it is almost impossible to catch them.
Dragonflies lay their eggs in water. Once hatched the dragonfly nymphs live up to five years underwater before becoming adult dragonflies. On becoming flying adults, they only live about a month longer, just long enough to mate and lay eggs for the next generation.
For more information on these fascinating creatures, visit this Dragonfly link.