Types of Invasive Iguanas in Florida: What Property Owners Should Know

Florida has three established invasive iguanas, according to UF/IFAS: the green iguana, the Mexican spiny-tailed iguana, and the black spiny-tailed iguana. The green iguana is by far the most common and the one behind most property damage.

When most people in South Florida say "iguana," they are usually thinking of the common green iguana. But green iguanas are not the only invasive iguanas showing up in Florida.

According to UF/IFAS, three large members of the iguana family have become established in South Florida: the green iguana (Iguana iguana), the Mexican spiny-tailed iguana (Ctenosaura pectinata), and the black spiny-tailed iguana (Ctenosaura similis). These species did not evolve here. They were introduced through the pet trade and are now part of Florida's nonnative reptile problem.

That matters for property owners because different invasive iguanas can look different, behave differently, and create different kinds of problems. Some are mostly plant-eaters. Others are more aggressive feeders. Some are better climbers. Some are more rugged-looking and more likely to be confused with other reptiles.

If you are seeing large lizards around your property, it helps to know which invasive iguanas are actually established in Florida and what makes them different.

Why This Matters in Florida

Florida's warm climate, exotic pet trade history, canals, seawalls, tropical landscaping, and waterfront development all make the state especially vulnerable to nonnative reptiles. Escaped or released pet iguanas were able to survive, reproduce, and establish populations in South Florida. For property owners, this is not just a wildlife trivia issue. Invasive iguanas can be tied to:

  • Burrows near seawalls, slopes, and foundations
  • Damage to flowers and ornamental landscaping
  • Droppings on docks, pool decks, patios, and walkways
  • Repeat basking and feeding activity
  • Long-term infestation patterns on waterfront and heavily landscaped properties

1. Green Iguana

The green iguana is the invasive iguana most people know best in Florida. It is also the one most commonly associated with South Florida neighborhoods, seawalls, canal banks, golf courses, HOAs, hotels, and landscaped residential properties. Florida wildlife authorities classify the green iguana as a nonnative invasive species. It is not protected except by anti-cruelty laws, and it can be humanely removed from private property year-round with landowner permission. Green iguanas are large, long-bodied lizards with a very long tail, a row of dorsal spines down the back, a large dewlap under the throat, and a heavy-bodied classic iguana profile. Juveniles are often bright green. Adults are usually more muted green, gray-green, or orange-toned during parts of the breeding season, and they commonly reach about 4 to 6 feet in total length. This is the species most likely to be behind the classic South Florida iguana problem people think of, and they are especially associated with burrowing, landscape feeding, droppings in common areas, repeat activity around water, and damage near seawalls and canal banks.

2. Black Spiny-Tailed Iguana

The black spiny-tailed iguana is another true invasive iguana established in Florida. It is not just a lookalike — it is a real invasive iguana with established Florida populations. Compared with green iguanas, black spiny-tailed iguanas are usually shorter and stockier, more gray, tan, or brown than green, more rugged-looking, marked with darker bands, and equipped with a rough, heavily spined tail. Juveniles can sometimes be green, which can make them easier to confuse with young green iguanas. Adults may exceed 4 feet in total length. Black spiny-tailed iguanas create many of the same property concerns people associate with green iguanas, including burrowing, droppings, and landscape damage. They are also more omnivorous than green iguanas and can affect wildlife in addition to causing property problems. For property owners, the practical point is simple: even if the lizard does not look like a classic green iguana, it may still be a true invasive iguana causing real issues.

An aggressive black spiny-tailed iguana caught in one of our traps in South Florida. Notice the gray-brown coloring, dark banding, and heavily spined tail that set this species apart from the common green iguana — and the defensive, open-mouth aggression these iguanas show when cornered.

3. Mexican Spiny-Tailed Iguana

The Mexican spiny-tailed iguana is the third major invasive iguana species established in South Florida. This species is especially important because it can be difficult for property owners to distinguish from the black spiny-tailed iguana. Mexican spiny-tailed iguanas are generally shorter and rougher-looking than green iguanas, darker and less uniformly green, heavily built around the tail, and more spiny and less smooth in profile. For most property owners, the practical point is that a darker, rougher-looking iguana with a distinctly spiny tail may be one of the spiny-tailed species rather than a green iguana.

Are There Other Iguanas in Florida?

There are occasionally other escaped exotic pets and unusual reptile sightings in Florida, but the main point for property owners is this: the three main invasive iguanas established in South Florida are the green iguana, black spiny-tailed iguana, and Mexican spiny-tailed iguana. That is an important distinction. A lot of people blur the line between true invasive iguanas, other invasive lizards, and lizards commonly mistaken for iguanas. Those are not the same thing.

Iguanas vs. Lizards Mistaken for Iguanas

This article is about actual invasive iguana species, not every reptile people confuse with them. In South Florida, people often mistake other large lizards for iguanas. That includes basilisks, large anoles, tegus, and monitor lizards. But those are not the main invasive iguana species established in Florida. That means if you want to know what types of invasive iguanas are really showing up in Florida, the answer is not every big lizard. It is primarily these three established iguana-family species.

Which Invasive Iguana Is Most Common in South Florida?

For most homeowners and property managers in Palm Beach and Broward Counties, the green iguana is still the one most commonly seen around canals, lakes, seawalls, pool decks, roofs, docks, and tropical landscaping. But that does not mean every large iguana is a green iguana. Spiny-tailed iguanas are also established in Florida and can create their own property and ecological problems.

Why Species Matters for Property Owners

Knowing which invasive iguana species you are dealing with can help explain what kind of activity you are seeing on the property. A green iguana may point to the classic South Florida pattern of basking near water, feeding on ornamental plants, digging burrows, and leaving droppings in common-use areas. A spiny-tailed iguana may look rougher, move differently, and be tied to a somewhat different feeding pattern and behavior profile. Either way, repeat sightings matter more than one random encounter. And if activity is building, that usually points to a larger control problem worth addressing before it grows.

What to Do If You See One

If you see a suspected invasive iguana on your property:

  • Take a clear photo if you can do so safely
  • Look at body shape, color, and especially the tail
  • Note whether the animal is near water, landscaping, burrows, docks, or seawalls
  • Watch for repeated activity in the same areas

Invasive Iguanas in Boca Raton, Delray Beach, Boynton Beach, and Across South Florida

In South Florida, invasive iguanas are most often associated with waterfront lots, canal communities, HOA neighborhoods, marinas, resorts, golf courses, and heavily landscaped residential or commercial properties. These environments provide sun, vegetation, cover, and water access that make repeat activity easier. That is why understanding the types of invasive iguanas in Florida is useful. It helps property owners recognize whether they are dealing with a true iguana issue and take recurring activity seriously before it turns into a larger control problem.

Need Help with Invasive Iguanas on Your Property?

If you are seeing repeat iguana activity around your seawall, canal bank, dock, pool area, landscaping, HOA common area, or commercial property, the problem may be bigger than one isolated sighting. Iguana Gone Removal and Prevention provides professional iguana removal and control for South Florida properties. If invasive iguanas are becoming a repeat issue on your property, call (561) 310-1114 to schedule an assessment.