A terrestrial ecoregion is a geographic area characterized by its distinctive plant and animal communities. Some synonyms for this term include bioregion, ecological region, and wildlife ecosystem. Bioregion refers to a region defined by its ecological and geographical boundaries. An ecological region is an area with distinct vegetation and animal communities, while a wildlife ecosystem is a geographic area defined by the presence of various wildlife species. Other terms that can be used as synonyms for terrestrial ecoregion include ecozone, biotic zone, and habitat region. Ultimately, all of these terms refer to distinct areas of the planet that are defined by their unique ecological makeup and often possess particular conservation significance.