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The estuaries of the Southeast — from the Chesapeake Bay to the Texas Laguna Madre, across more than 30,000 miles of tidal shoreline — are among the most productive ecosystems on Earth, the nursery for most of the region's coastal fish and shellfish. This synthesis covers the inshore-saltwater system: the marsh-grass detrital engine that feeds it, the three kinds of estuary, the marsh-mangrove-seagrass-oyster habitats, the keystone species, and the threats reshaping the coast

The American black bear is one of the Southeast's quietest conservation successes — recovered from early-1900s remnants to a regional population now estimated above 55,000, from the southern Appalachians to the Okefenokee and Big Cypress. This synthesis covers the ecology: the island-population structure and its recolonization, the mast-driven seasonal cycle and denning gradient, the large-landscape habitat and corridor needs, and the recovery-and-conflict arc at the suburban

The American alligator is famous for being large and dangerous. Its ecological significance has almost nothing to do with its teeth. It has to do with its feet, its tail, and its habit of excavating depressions in the wetland substrate — depressions that hold water when everything else dries out, concentrate entire food webs during the dry season, and sustain the southeastern Coastal Plain ecosystem from the Texas Sabine to the North Carolina Outer Banks.

On the first Saturday of September, hundreds of thousands of hunters walk into sunflower fields across the Southeast at four in the afternoon and wait for birds that weigh four ounces. The mourning dove is the most harvested migratory game bird in North America — more than all duck species combined in most years. Its population holds because it can produce ten to twelve fledglings per pair per breeding season. That number does not happen anywhere else in the game-bird world.

There is a sound that used to define the rural South — a two-note rising whistle carrying across pine flats and cotton fields from Virginia to Louisiana. The Northern Bobwhite has declined 85 percent since 1966. That is more than 25 million individual quail gone from the southeastern landscape. This is not a story about overhunting. It is a story about fire suppression, longleaf loss, and a landscape that stopped doing what it once did to sustain the species.

Invasive species are remaking the Southeastern outdoors — but the honest 2026 picture separates the genuinely destructive from the over-hyped. This field report covers the worst current invaders, from Burmese pythons and jumping silver carp to lionfish, feral hogs, hydrilla and the bald-eagle disease it carries, and the forest pests warming trout streams — with the current outlook and how each is hurting the environment, the operators, and the tourism economy.

The Mississippi Flyway handles an estimated 40 percent of North America's duck and goose migration -- more waterfowl than any other flyway on the continent. This synthesis covers flyway structure from the prairie pothole breeding grounds through the Gulf Coast wintering grounds, the four food systems of the MAV, Louisiana's 2,000-square-mile coastal land loss, and the climate-driven migration shift redistributing birds northward.

The eastern wild turkey was restored from roughly one million continental birds in the 1930s to six to seven million by the early 2000s -- and is now entering a recruitment crisis that has reduced populations by 20 to 40 percent across the Southeast. This synthesis covers the full biology: mating system, brood ecology, the poult-per-hen ratios that quantify the decline, and the prescribed-fire management that offers the clearest path forward.

The white-tailed deer is the most widely distributed large mammal in the southeastern United States and a keystone herbivore whose browsing pressure shapes forest understory composition across eleven states. This synthesis covers population ecology from near-extirpation through restoration to today's management challenges: CWD emergence, coyote-driven fawn mortality, the soil-antler connection, and rut timing variation from October in Virginia to January in South Florida.

The southeastern United States is one of the most biologically rich temperate regions on Earth -- holding roughly 550 freshwater fish species, the highest salamander diversity of any region in the world, and a convergence of ecoregions that has no parallel in the Northern Hemisphere.