American Alligator

Quick Take

• Alligators look slow and clumsy on land, yet their actual top speed might make you rethink getting close to one. See their speed facts →
• Adult alligators don't stop at fish and frogs. The prey they've been documented hunting might genuinely surprise you. Explore their full diet →
• Alligator DNA tells a story that makes the dinosaurs look like newcomers, and it raises a fascinating question about survival. Discover their ancient origins →
• Losing a tooth isn't a problem for alligators. Their biology has a built-in solution most people don't know about. Learn about regrowable teeth →

The American alligator is a large reptile found in the swamps, rivers, and wetlands of the southeastern United States. It was once hunted to near extinction, but conservation efforts helped its population recover. Today it remains one of the region’s most recognizable predators.

Three Amazing American Alligator Facts

• Alligators are found in 10 states, with the highest populations found in Florida and Louisiana.
• Their scales darken with age and may turn almost black.
• Although they prefer to attack pets, they may also attack humans if the latter wander too close.

Classification and Evolution

Alligators are in the same family as other large reptiles like Crocodiles but are native to only two countries, the USA and China (where the Alligator is now nearly extinct). Alligators tend to be smaller than their Crocodile cousins but have been known to move at speeds of up to 11mph on land, making them one of the fastest large reptiles in the world. Despite their size, there are a number of distinct differences between Alligators and Crocodiles, as an Alligator’s snout is shorter than that of a Crocodile, and with their mouths shut, an Alligator’s teeth cannot be seen, but a Crocodile’s can. Alligators are also commonly known as Gators in their native, southern North American habitats.

Anatomy and Appearance

Alligators are very large reptiles, with males growing up to 14.8 feet (4.5 meters) in length. The female Alligator tends to be slightly smaller, with an average total body and tail length of around 8.5 feet (2.6 meters), rarely exceeding 9.8 feet (3 meters). The Chinese Alligator is a much smaller species, almost half the size of a female American Alligator.

Alligators have an armour-plated body that varies in color from yellow to green, to brown, finally turning almost completely black in old age. The tail of the Alligator is incredibly muscular and is used to propel the animal when it is in the water. Alligators have short, stocky legs with webbing between their toes. This not only helps them when they are swimming but also means that they can negotiate muddy river banks with ease.

Alligators have multiple stomachs. The first part of their stomach contains stones to grind up food, while the second part is extremely acidic and aids in digestion.

Distribution and Habitat

American Alligators are found in the southeastern USA, throughout all of Florida and Louisiana, the southern parts of Georgia, Alabama, and Mississippi, coastal South and North Carolina, eastern Texas, the southeastern corner of Oklahoma, and the southern tip of Arkansas. The majority of American Alligators inhabit Florida and Louisiana, with over a million alligators thought to be found between the two states. American Alligators live in freshwater environments, such as ponds, marshes, wetlands, rivers, lakes, and swamps, as well as brackish environments. Southern Florida is the only place in the world where both Alligators and Crocodiles are known to live in the same place.

Behavior and Lifestyle

The Alligator is a solitary predator that is actually surprisingly clunky when moving about on land. They tend to be quite slow, moving by either crawling or sliding along the slippery banks on their bellies. They are highly territorial animals that are known to make a variety of noises to represent different things, including the declaration of territory, finding a mate, or the young warning their mother that they are in danger. Male alligators, however, do not appear to have such a prominent voice box and make very little noise outside of the breeding season, when they are known to growl and bellow to fend off competing males.

Reproduction and Life Cycles

Alligators tend to breed during the spring when they come together in large groups to find a suitable partner. The female constructs a nest out of mud, leaves, and twigs on the ground where she lays up to 50 eggs. The hatchlings emerge after an approximately 65-day incubation period, which occurs in the nest’s rotting vegetation. Females do not incubate their eggs as they would break them, but still guard their nest from hungry predators. The baby Alligators are between 6 and 10 inches long when they hatch and are vulnerable to predation from several species. They usually remain with their mother for the first 3 years. Alligators tend to live to about 50 years old or so, but some have been known to live at least another 20 years when in captivity.

Diet and Prey

The Alligator is generally a solitary predator, but smaller and younger individuals are known to stay together in groups, especially when hunting. The reptile eats fish, small mammals, and birds, but has also been known to attack much larger animals. Adult alligators have been known to hunt Deer and are well known to kill and eat smaller Alligators. In some cases, larger individuals have been known to hunt the Florida Panther and Black Bears, making the alligator the dominant predator throughout their environment. Attacks on pets and even people are also not unknown.

Predators and Threats

The Alligator is an apex predator in its environment, known to even hunt animals that are much larger in size. Humans are the only predator of adult alligators, as they were hunted almost to extinction for their meat and for their unique skin, which was used in the manufacture of a variety of products. The smaller, baby Alligators, however, are prey to several species, including Raccoons, Birds, Bobcats, and even other Alligators. Despite being protected from hunting in much of its North American range today, Alligators are threatened by the loss of their natural habitats and high levels of pollution in the water.

Interesting Facts and Features

Alligator DNA is thought to date back to even before Dinosaur times, meaning that the Alligators survived whatever it was that the dinosaurs didn’t, with the scientific estimates first dating the species 150 million years ago. The Chinese Alligator is currently found only in the Yangtze River Valley, and the Chinese Alligator is now extremely endangered, with less than 100 Chinese Alligators believed to be left in the wild. There are actually many more Chinese Alligators that live in zoos around the world than can be found in the wild today.

Alligators are known to have up to 80 teeth, which are perfectly shaped for biting down on prey. They are even able to regrow those teeth that are lost.

Relationship with Humans

Unlike large Crocodiles, Alligators do not immediately regard a Human upon encounter as prey, but the Alligator may still attack in self-defence if provoked. Alligator attacks are uncommon, but they have definitely been known to attack Humans if they infringe on the reptile’s territory and particularly if the animal feels threatened. They are, however, known to commonly prey on domestic animals including pets and sometimes livestock when they are close to Human settlements. Hunting towards the end of the last century almost completely obliterated the entire American Alligator population (and has pretty much done so to the Chinese Alligator). Fortunately, the gravity of the situation in the USA was realized before it was too late, with the protection of the species having led to an increase in population numbers now.

Conservation Status and Life Today

The American Alligator was once an Endangered species, but thanks to habitat protection and federal laws protecting them, populations throughout Florida and Louisiana have recovered really well, with over four million Alligators thought to exist in the USA today. They are, however, now threatened by habitat degradation, mainly in the form of deforestation and pollution in the water. The story of the Chinese Alligator, however, is very different; with less than 100 individuals thought to be left in the Yangtze River Valley, this species is Critically Endangered in the wild and is sadly on the verge of extinction.