Protecting South Florida Homes From the World's Most Invasive Termite

The Asian subterranean termite (Coptotermes gestroi) may be the most invasive termite in the world, according to University of Florida researchers, and South Florida is one of the places it has made itself at home. It shares the region with its close relative, the Formosan subterranean termite, which is listed among the 100 worst invasive species on the planet.

For homeowners in Miami-Dade, Broward, Palm Beach and the Keys, that is not trivia. These termites form large hidden colonies, spread with people and boats, and are now producing hybrids. This guide explains what makes them so invasive, how they reached South Florida and the practical steps that protect your home.

What Makes a Termite “Invasive”?

An invasive species is one that people have carried far from its native range and that thrives and causes harm where it lands. Florida has several. UF/IFAS reports that six invasive termite species are now established in the state, and that three of them, the Formosan, Asian subterranean and West Indian drywood termites, cause most of the structural damage.

The two Coptotermes species stand out. In a 2015 UF/IFAS report, researchers called the Formosan and Asian subterranean termites two of the world’s most destructive termite species and said the Asian termite may be the most invasive termite in the world. The Formosan termite has consistently been listed among the 100 worst invasive species, according to UF/IFAS.

The Traits Behind the Reputation

• Large colonies. Both species form massive colonies that send out huge swarms of winged reproductives. UF/IFAS describes Formosan colonies of several million termites.
• Long-lived colonies. UF/IFAS entomologist Nan-Yao Su has noted that a termite colony can live up to 20 years with millions of individuals.
• Nests beyond the soil. Coptotermes termites fill wall voids and hollowed wood with carton nest, and they infest trees as well as buildings.
• Fast, severe damage. UF/IFAS warns that Asian subterranean termite damage can become severe in a relatively short time once a large, mature colony invades a structure.
• Hitchhiking. They spread with human transport, including ships and recreational boats.

How the Asian Subterranean Termite Reached South Florida

The species is native to Southeast Asia. People carried it across the tropics long before it reached the US mainland. UF/IFAS records it in Brazil in 1923, Barbados in 1937 and later across the West Indies, where it has even invaded natural woodlands, and in southern Mexico.

Source: UF/IFAS EDIS IN285.

The Riviera Beach colonies were long the northernmost established colonies of the species known anywhere in the world. Its tropical needs were expected to limit it to areas up to about 26 degrees north, mostly in southern Florida, but a 2026 University of Florida study found it established as far north as Brevard and Hillsborough counties. Inside that range, though, UF/IFAS expects infestations to keep becoming more common.

Boats, Swarms and Neighborhoods: How It Keeps Spreading

Once established, the termite spreads in two main ways.

By boat. UF/IFAS identifies shipboard infestations as the most likely way people move this termite, because swarms that start aboard a boat can reach land. Private boats arriving from Jamaica, Virgin Gorda and the Turks and Caicos have been found infested at Florida docks. In 2025, UF/IFAS described Fort Lauderdale as a known hotspot for introductions via recreational boats.

By swarming. From February to April, mature colonies release large flights at dusk and at night. Swarmers are drawn to lights, pair off and start new colonies near homes. Our article on how Asian subterranean termites spread through entire neighborhoods explains why one infested block can become many.

UF/IFAS identified Miami-Dade and Broward as the first counties where both the Asian and Formosan termites were established. In 2018, UF/IFAS researchers described the Miami-Fort Lauderdale area, home to about 6 million people, as the only place in the continental US where the two species overlapped at the time, and predicted that by 2040 half the structures in South Florida will be at risk of infestation.

Hybrid Termites: A New Chapter

When two invasive termites share a city, they can meet in the air. In 2015, UF/IFAS researchers found that the swarming seasons of the Asian and Formosan termites overlap in South Florida and that Asian males preferred to pair with Formosan females. In the laboratory, hybrid colonies developed about twice as fast as either parent species.

In 2025, UF/IFAS confirmed that hybrid colonies are established in urban South Florida. Researchers have confirmed hybrid swarms every year since 2021, and in October 2024 a survey of a city park led researchers to a tree infested with a hybrid colony that had likely been there for more than five years. UF/IFAS researcher Thomas Chouvenc estimates there could be many hundreds of hybrid colonies in the region, and says the process has likely been going on for a decade and cannot be stopped.

The long-term impact of hybrids is still unknown. For homeowners, the practical message is the same: these termites live hidden for years, so inspections and protection matter more than waiting for visible damage.

Why This Matters for Your Home

A typical South Florida house has plenty of wood even when the walls are concrete block: roof trusses, door and window frames, cabinets, baseboards and furring strips. Coptotermes colonies reach that wood through cracks and joints, travel inside walls and can fill voids with carton nest. Advanced infestations can include:

• Hollowed framing, door casings and trim
• Blistered paint or bubbling surfaces over damaged wood
• Carton material inside walls or hollow wood
• Large indoor swarms, which UF/IFAS says usually indicate a structural infestation
• Infested trees close to the house

For a closer look at how these colonies grow out of sight, see how Asian subterranean termites build massive hidden colonies on our species page for the Asian subterranean termite.

How to Protect Your Home From Invasive Termites

At Home

• Fix leaks, reroute AC condensate and aim sprinklers away from the walls.
• Keep mulch thin, wood off the soil and the foundation visible.
• Keep doors closed and screens repaired during swarm season, and turn off unneeded outdoor lights at night.
• Have trees near the house checked; UF/IFAS recommends inspecting surrounding trees regularly.

On the Water

• Inspect boats for mud tubes, soft wood and carton, especially if they travel to and from the Caribbean.
• Report winged termites seen aboard at night in spring to a professional.

As a Community

Because these termites move between properties, UF/IFAS researchers call for area-wide termite management programs. Condo associations and HOAs that inspect and protect buildings together reduce the chance that one untreated property keeps reinfesting its neighbors. Our article on HOA termite problems explains how that plays out in shared communities.

Professional Protection Against Invasive Subterranean Termites

UF/IFAS recommends baits and soil treatments for the Asian subterranean termite, the same strategies used against the Formosan termite, applied by licensed professionals. Baits are designed to eliminate the colony, while liquid soil treatments keep termites out of a treated zone. For a detailed comparison, read our guide to preventive treatments for Asian subterranean termites.

Toro’s termite control service starts with a free inspection in which a trained technician identifies the species and checks how far the termites have spread. For subterranean termites, Toro installs the Sentricon baiting system in the soil around the property, with no drilling into the slab and no trenches. Termites carry the bait back to the colony, which is designed to eliminate it, including the queen, and the stations stay in place for year-round protection against new colonies. Toro has protected South Florida since 1969, trains its technicians at the TORO Institute with on-staff entomologists, and backs every job with the 110% Satisfaction Guarantee.

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Frequently Asked Questions

Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.

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