The Illinois Nature Preserves System is a network of protected natural areas in Illinois, established to conserve the state's diverse ecosystems and wildlife. It includes prairies, wetlands, forests, and other habitats that support various plant and animal species. The system aims to preserve these areas for future generations while providing opportunities for education and recreation. Managed by the Illinois Department of Natural Resources, the system designates specific sites as nature preserves, ensuring their protection from development and degradation. This initiative helps maintain biodiversity and promotes ecological research, contributing to the overall health of the environment in Illinois.