Ecorobots are robotic systems designed with sustainability and environmental friendliness in mind. Developed to perform tasks with efficient energy consumption, they must act in the environment in a noninvasive way and comply with uncertainties. Nature has already engineered systems to cope effectively with variable conditions and perturbations by relying on intelligent design and efficient decision-making strategies. This talk will provide selected examples of ecorobots inspired by animals and plants that inhabit different domains: water, soil, and air. It will highlight the importance of analyzing specific constraints offered by the environment in defining design rules and, at the same time, exploiting those constraints in an advantageous way to shape robot behavior. The embodiment of natural behaviors in robotic technologies can leverage compliance in robot morphologies and behaviors, thus releasing a less invasive and more efficient system that can safely act in natural scenarios to perform environmental exploration, monitoring, restoration, and waste management.