Periodical cicadas.
In the United States, there is a species of cicada whose lifespan reaches 17 years. In comparison, their other "relatives" live significantly shorter: only 3–4 years.
American periodical cicadas (Magicicada cassini, in the image) spend most of their existence underground, emerging to the surface only for 5 weeks to lay eggs on trees, after which they die.
The "babies," just hatched, fall to the ground and burrow into the soil, attaching themselves to the roots of trees. In this state, these pupae remain motionless for the next 17 years, feeding on the sap of the roots.
