Alligators are apex predators as adults, but they spend years being vulnerable to a long list of predators before they reach that status. Roughly 54% of hatchlings survive their first year, and the threats shift dramatically as an alligator grows. Everything from raccoons to other alligators takes a toll at different life stages.
Nest Raiders: The Biggest Threat to Eggs
An alligator’s most dangerous period begins before it even hatches. Nests are raided by raccoons, feral pigs, black bears, river otters, Virginia opossums, and bobcats. In a study of alligator nests in coastal South Carolina, raccoons were responsible for nearly 43% of all nest predation, making them the single most destructive egg predator. Opossums were less thorough, opening nests and eating just one egg before moving on, leaving the rest to hatch successfully.
Birds also take eggs. Crows, ravens, and vultures are known egg feeders, and researchers in South Carolina documented a Carolina wren eating from a recently cracked alligator egg, the first time a songbird had ever been recorded eating crocodilian eggs. Invasive species add to the pressure: Argentine black and white tegus, large lizards now established in parts of the southeastern U.S., raid alligator nests. Even red imported fire ants attack eggs and can kill hatchlings that are still emerging.
What Hunts Hatchlings and Juveniles
Once hatchlings leave the nest, they face a new wave of predators. Wading birds like great blue herons, large fish such as largemouth bass and gar, snapping turtles, and snakes all eat baby alligators. Bobcats have been documented snatching hatchlings as they emerge from nests. Researchers captured trail camera images of bobcats grasping hatching eggs in their mouths, plucking them from egg chambers that had just been opened by the attending mother alligator. In total, six separate observations of bobcat predation on alligators were recorded in South Carolina, targeting hatchlings, eggs, and juveniles.
River otters are surprisingly effective predators of young alligators. A well-known series of photographs from Florida showed a river otter attacking and killing an alligator estimated to be three to four years old and about five feet long. Otters typically eat fish and amphibians, but they also take snapping turtles, snakes, and small gators. As one wildlife expert put it: “When they’re hatchlings, everything eats them.”
Alligators Prey on Each Other
Cannibalism is a consistent source of mortality for young alligators. Larger alligators eat smaller ones, and this isn’t rare or incidental. Research published through the U.S. Geological Survey estimated that cannibalism removes 6 to 7% of the juvenile alligator population every year. That makes other alligators one of the most significant predators a young alligator faces, alongside raccoons at the nest stage.
This pressure doesn’t fully disappear with size. Sub-adult alligators in territories dominated by large males remain at risk. The threat only drops off once an alligator reaches a size where few other alligators can overpower it, typically around six to seven feet long.
Burmese Pythons in the Everglades
In southern Florida, Burmese pythons have become a significant new predator of alligators. These invasive snakes, which can exceed 15 feet in length, compete with alligators and sometimes kill them. Documented encounters go both ways: pythons have been found dead after attempting to eat alligators too large for them, and alligators have been filmed dragging enormous pythons out of the water. But for juvenile and mid-sized alligators, large pythons are a real threat. The python invasion has dramatically reduced mammal populations in the Everglades, and alligators now share their ecosystem with a predator that didn’t exist there 40 years ago.
Humans Are the Top Predator of Adults
Once an American alligator reaches adult size, no wild animal regularly preys on it. Humans are the exception. Louisiana alone harvests an average of around 24,000 wild alligators per year, with a peak of over 36,000 in 2014. Between 1999 and 2006, the annual harvest averaged about 33,000 animals. Florida runs its own regulated harvest program, and several other southeastern states do as well.
For the Chinese alligator, a much smaller species found only along the Yangtze River in China, humans are the sole predator of adults. Chinese alligators are hunted for their meat and organs, which are used in traditional medicine. The species is critically endangered, with only a few hundred left in the wild.
Why Size Is the Dividing Line
The pattern across all of these predators is straightforward: size determines vulnerability. A hatchling alligator is about nine inches long and weighs a few ounces. It’s prey for herons, bass, raccoons, otters, and dozens of other animals. A six-foot juvenile still faces threats from large pythons, bobcats, and bigger alligators. But a fully grown American alligator, which can reach 11 to 15 feet and weigh over 400 pounds, has effectively outgrown every natural predator except its own species and humans.
The combination of heavy nest predation, juvenile cannibalism, and the gauntlet of predators in the first few years means that only a small fraction of alligators born in any given year will reach adulthood. Those that do become the armored, powerful predators most people picture when they think of alligators, but the road there is long and dangerous.