The biggest wildlife refuge on the island is the J.N. "Ding" Darling National Wildlife Refuge, Covering more than 5200 acres of land, the refuge strives to ensure that these lands are "preserved, restored and maintained as a haven for indigenous and migratory wildlife as part of a nation-wide network of Refuges administered by the U.S. Fish and Wildlife Service" The lands also serve to provide a home for many endangered and threatened species.