American Alligator

Alligator mississippiensis
American Alligator

A member of the crocodile family, the American alligator is a living fossil from the Age of Reptiles, having survived on earth for 200 million years. Though they live in refuge wetlands year-round, the best time for viewing alligators around the wildlife drive is during spring and fall when temperatures are mild. This is when they’re most likely to spend the day sunning themselves on mud flats and the banks of impoundments. During the hottest part of the summer, alligators are a little less conspicuous, spending much of their time floating in the canals and aquatic impoundments. Although alligators should be considered dangerous, they are inherently afraid of humans, and typically pose no serious threat if left alone. It’s when people start feeding an alligator that it begins to lose this fear and can become extremely dangerous to people, especially small children and pets. It is a violation of state and federal law to feed or harass alligators in any way. 

Description and Diet
The alligator can be distinguished from the crocodile by its head shape and color. The crocodile has a narrower snout, and unlike the alligator, has lower jaw teeth that are visible even when its mouth is shut. In addition, adult alligators are black, while crocodiles are brownish in color.

While alligators move very quickly in water, they are generally slow-moving on land, although they can be quick for short distances.

Alligators will eat just about anything, but primarily consume fish, turtles, and snails. Small animals that come to the water's edge to drink make easy prey.

Biological Role
As during the Reptile Age, alligators live in wetlands, vital habitat that holds the key to their continued survival. As predators at the top of the food chain, alligators help control numbers of rodents and other animals that might overtax the marshland vegetation.

The alligator's greatest value to the marsh and other animals within it are the "gator holes" that many adults create and expand through the years. These depressions in the earth stay full of water in the wet season and hold water after the rains stop. During the dry season, and particularly during extended droughts, gator holes provide vital water for fish, insects, crustaceans, snakes, turtles, birds, and other animals, in addition to the alligator itself.

 Breeding and Life History

The alligator's breeding season begins in the spring. Although alligators have no vocal cords, males bellow loudly to attract mates and warn off other males during this time by sucking air into their lungs and blowing it out in intermittent, deep-toned roars.

The female builds a nest of vegetation, sticks, leaves, and mud in a sheltered spot in or near the water. After she lays 20 to 50 white, goose-egg sized eggs, she covers them under more vegetation, which, like mulch, heats as it decays, helping to keep the eggs warm. She remains near the nest throughout the 65-day incubation period, protecting the nest from intruders. When the young begin to hatch, they emit a high-pitched croaking noise, and the female quickly digs them out. The young, tiny replicas of adult alligators with a series of yellow bands around their bodies, then find their way to water.

Alligators reach breeding maturity between the ages of 8 and 13 years, at which time they are about 6 to 7 feet long. From then on, growth continues at a slower rate.

Decline and Recovery
American alligator populations reached all-time lows in the 1950s, primarily due to market-hunting and habitat loss. However, in 1987, the alligator was pronounced fully recovered, making it one of the first endangered species success stories. Today, alligators are found throughout the Southeast, from the Carolinas to Texas and north to Arkansas

Although the American alligator is now secure, some related animals - such as several species of crocodiles and caimans - are still in trouble. For this reason, the Fish and Wildlife Service continues to protect the alligator under the ESA classification as "threatened due to similarity of appearance." The Service thus regulates the harvest of alligators and legal trade in the animals, their skins, and products made from them, as part of efforts to prevent the illegals take and trafficking of endangered "look-alike" reptiles.

Facts About American Alligator

Average Lifespan
35 - 50 years
Up to 1,000 lbs.
8 feet (average female); 11 feet (average male)