The dragonfly in a unique way, the male and female dragonflies will hook together to form an interesting pose when the process of mating occurs. This interconnected process will continue until the males release sperm or until the females remove their eggs in the water.
Dragonflies have a sharp vision to distinguish colors of their kind. Dragonflies will find the most favored female dragonflies and will approach them. The dragonflies will grip the thorax of a female dragonfly, and if the dragonflies fit the dragonfly, the marriage process will take place soon.
Thanks @goodkarma