The American alligator is a large alligator endemic to the Southeastern United States.
Adult male American alligators measure 3 to 5m in length, and can weigh up to 453 kg. Females are smaller compared to males. The American alligator inhabits freshwater wetlands such as marshes and cypress swamps.
On average, American alligator is the second-largest species in the alligator behind only the black caiman. Weight varies considerably depending on length, age, health, season, and available food sources. Adult American alligators held the record as having the strongest laboratory-measured bite of any living animal, measured at up to 2961 lbf.
American alligators are apex predators and consume fish, amphibians, reptiles, birds and mammals. Hatchlings feed mostly on invertebrates. They play an important role as ecosystem engineers in wetland ecosystems through the creation of alligator holes, which provide both wet and dry habitats for other organisms. Throughout the year, in particular during the breeding season, American alligators bellow to declare territory and locate suitable mates.