Dragonflies are flying insects with two pairs of see-through wings, huge eyes, and long bodies. They live near lakes, streams, and ponds throughout most of the world. There are about 2,500 species of dragonfly. Dragonflies are ancient insects, dating back before the beginning of the reign of the dinosaurs some 225 million years ago. Present–day dragonflies do not differ very much from their ancestors.
Dragonflies feed mostly on other insects. They are very fast and their large eyes allow them to spot prey above, below, in front, behind, and on both sides of them. They can fly at the speed of up to 57 km / h. Dragonflies are considered the most dangerous predators.