Yes, American crocodiles are indeed found in the Florida Keys. These reptiles are native to the region and represent the northernmost extent of their range in the Americas. Their presence in the Keys is a natural part of the diverse ecosystem, contributing to the area’s unique wildlife.
The American Crocodile in Florida
The American crocodile, Crocodylus acutus, possesses distinct physical traits that set it apart. These crocodiles can reach impressive sizes, with males often growing larger than females. While the average mature male is typically between 9.5 to 13.5 feet long and can weigh up to 880 pounds, exceptionally large individuals may exceed 16 feet. Females are generally smaller, rarely surpassing 12.5 feet in length. American crocodiles are ectothermic, meaning they regulate their body temperature by basking in the sun or moving to areas with warmer or cooler water, and they primarily inhabit brackish or saltwater environments.
Where Crocodiles Reside in the Florida Keys
American crocodiles primarily inhabit coastal areas, thriving in brackish and saltwater environments throughout the Florida Keys. These include mangrove swamps, coastal estuaries, and various canals. The dense root systems of mangroves provide both shelter and nesting sites for these reptiles.
They are particularly concentrated in the northern Keys, with significant populations found in areas like Key Largo and the coastal regions of Everglades National Park that extend into the Keys. Their preference for these habitats is due to the availability of food sources, suitable nesting locations, and the ability to regulate their body temperature within these diverse aquatic settings. The Crocodile Lake National Wildlife Refuge on Key Largo was specifically established to protect and preserve this critical habitat for the species.
Crocodiles Versus Alligators
Distinguishing between American crocodiles and American alligators is a common point of interest for many observers. One of the most apparent differences lies in their snout shape. American crocodiles have a more pointed, V-shaped snout, whereas American alligators possess a broader, U-shaped snout.
Another key distinction is tooth visibility: when a crocodile’s mouth is closed, the fourth tooth on its lower jaw is typically visible, while an alligator’s upper jaw largely conceals its lower teeth. Coloration also varies, with crocodiles generally appearing grayish-green, and alligators often having a darker, more blackish hue.
Their preferred habitats differ significantly as well. American crocodiles favor brackish and saltwater environments, such as coastal estuaries and mangrove areas, while alligators primarily inhabit freshwater lakes, rivers, and swamps. Although both species coexist in South Florida, particularly in Everglades National Park, their ecological niches generally keep them in separate areas within the Keys.
Coexisting with Crocodiles
American crocodiles are naturally shy and reclusive animals, and aggressive encounters with humans are uncommon. Despite their size, they typically prefer to avoid disturbances and will often retreat if startled.
The Florida population of American crocodiles is classified as a threatened species by the U.S. Fish and Wildlife Service and the Florida Fish and Wildlife Conservation Commission (FWC), underscoring the importance of their protection. To ensure safety and support conservation, several guidelines are recommended.
It is unlawful and dangerous to feed crocodiles, as this can cause them to lose their natural wariness of humans. Maintain a safe distance from these animals and keep pets on leashes, especially near water, as pets can resemble natural prey. Limit swimming to designated areas and during daylight hours, as crocodiles are more active between dusk and dawn. Concerns about a crocodile can be reported to the FWC.