The Okefenokee National Wildlife Refuge is the headwaters of the Suwannee and St. Marys rivers. The refuge provides habitat for threatened and endangered species, such as the red-cockaded woodpecker, indigo snake, and wood stork, along with a wide variety of other wildlife. It is world renowned for its amphibian populations that are bio-indicators of global health.The Okefenokee National Wildlife Refuge has 353,981 acres of National Wilderness Area within the refuge boundaries. In addition, the refuge is a Wetland of International Importance (RAMSAR Convention – 1971) because of the Okefenokee Swamp's importance and value on an international scale.