Dragon flies mate in the air. Eggs are then laid on a plant in the water, or just dropped in the water.
The eggs hatch and the nymph will live up to 4 years in the water. When they are ready and the weather is right, the nymph will crawl out onto a plant stem and shed its skin to become an adult dragon fly. Adult dragonflies only live about 2 months.
Looking at the nymph most would not know what it would become.
Psalm 66:1,2 "Shout joyfully to God, all the earth;
Sing the glory of His name;
Make His praise glorious."