Mobile-Tensaw Delta

Why should it be a National Park?

Where the Alabama and Tombigbee rivers meet and spread toward Mobile Bay lies a wetland of roughly two hundred and sixty thousand acres, the second largest river delta in the country. E.O. Wilson, who grew up nearby and became the most celebrated biologist of his generation, called it America's Amazon, and he meant it as a factual claim rather than a flourish.

The numbers support him. This corner of Alabama holds more species of freshwater fish, mussels, turtles, crayfish, and snails than anywhere else in North America. The delta alone has more than five hundred documented plant species. Alligators, black bears, and manatees all use it. Much of it can only be reached by boat, through a maze of bayous, sloughs, and cypress-tupelo swamp that the state has mapped as a canoe trail named for William Bartram, who traveled here in 1775.

The human record runs just as deep. Bottle Creek, on Mound Island in the middle of the delta, holds eighteen earthen mounds built by Mississippian people around 1250, the most important such site on the central Gulf Coast. The last ship to bring enslaved Africans to the United States, the Clotilda, was scuttled and burned in these waters in 1860, and its wreck was located in 2019.

Nobody has ever introduced a bill for a Mobile-Tensaw National Park. Wilson argued for one publicly for years, and when he died in 2021 the idea largely died with him as a political matter. Protection has come instead through land purchase: in 2024 the Nature Conservancy and Patagonia's conservation arm bought nearly eight thousand acres that had been slated for a wood-pellet mill, and in 2025 they named it for Wilson. The organizations involved say their goal is eventual national wildlife refuge status. The most biodiverse place in North America is being assembled quietly, one tract at a time, by people who gave up on Congress.