Have you ever heard a buzzing sound in the summertime? It might be a male cicada trying to impress a mate. Annual cicadas emerge from the ground at different times each summer. Cicadas start their lives as eggs. After six to 10 weeks, cicada young called nymphs hatch from the eggs and immediately fall to the ground. They burrow underground and attach to tree roots. The nymphs stay buried to suck tree sap from two to 17 years, depending on the species. When this underground life—called the dormant period—ends, the cicadas emerge aboveground at sunset, climb the trunk of a nearby tree, and shed their skin.

Source: National Geographic