Florida is home to 20 established termite species, six of them invasive, and the ones most likely to show up in or around your home fall into three groups: subterranean, drywood, and dampwood termites. Each looks distinctly different depending on the species and the caste (worker, soldier, or winged swarmer) you’re seeing. Knowing which one you’re looking at tells you a lot about how serious the problem is and where the colony is living.
Workers: The Ones Doing the Damage
Worker termites are the caste you’re least likely to see in the open, but they’re the ones actually eating wood. They’re small, completely white, wingless, soft-bodied, and eyeless. If you crack open a piece of infested wood or disturb a mud tube, the pale insects scattering away from the light are workers. Subterranean workers are noticeably smaller than drywood or dampwood workers, roughly 3 to 4 mm long, while drywood workers are a bit larger and dampwood workers can be significantly bigger.
Because all worker termites look similar at a glance (pale, soft, no wings), species identification at this caste level usually requires a trained eye or a magnifying lens. For most homeowners, the more useful identification comes from soldiers and swarmers.
Soldiers: Oversized Heads and Jaws
Soldiers are the colony’s defenders, and they’re easy to recognize by their enlarged, darker heads and heavy mandibles. Their bodies remain light caramel or cream colored, but their heads are amber to brown. You’ll often see them mixed in with workers when you break into an active colony or disturb a mud shelter tube.
The shape of the soldier’s head is one of the fastest ways to narrow down species. Formosan subterranean termite soldiers have a distinctive teardrop or egg-shaped head, while the native eastern subterranean termite soldiers have a more rectangular head. Both species are major structural pests in Florida, so this single detail can help a pest professional determine exactly what’s infesting your home. Dampwood termite soldiers are large, ranging from 8.5 to 13.5 mm long, with at least two visible teeth on their left mandible.
Swarmers: The Winged Termites You Actually See
Swarmers (also called alates) are the reproductive adults that leave the colony to start new ones. They’re the termite caste most Floridians encounter, often finding them clustered around windows, light fixtures, or in piles of shed wings on a windowsill. They are the only caste with pigmented bodies and functional eyes.
Eastern Subterranean Termite Swarmers
These are the most widespread termites in Florida and across North America. Swarmers are dark brown to brownish-black with brownish-gray wings. They’re small, roughly a quarter inch long. They fly during daylight hours, most often in late morning or early afternoon after a warm rain, from late February through May.
Formosan Subterranean Termite Swarmers
Formosan swarmers are yellowish-brown and larger, about half an inch long (12 to 15 mm). Their transparent wings have a dense covering of fine hair, which is visible under good light or a magnifying glass and distinguishes them from other species. These termites swarm at night, from early May through late June, and are strongly attracted to porch lights and exterior lighting. They’re concentrated in South Florida and are among the most destructive termite species in the world.
Asian Subterranean Termite Swarmers
The Asian subterranean termite is another invasive species in South Florida. Its swarmers look similar to Formosan swarmers, with light brown bodies. They also swarm at night, but earlier in the year, from mid-February through late May. Because these two invasive species overlap in appearance, a pest professional may be needed to tell them apart.
Drywood Termite Swarmers
The West Indian drywood termite is one of Florida’s major structural pests. Drywood swarmers tend to be slightly smaller than Formosan swarmers and vary from pale tan to dark brown depending on species. They swarm in the early evening during warmer months, typically late summer into fall. Unlike subterranean termites, drywood termites don’t need soil contact and live entirely inside the wood they infest.
Dampwood Termite Swarmers
Florida dampwood termites are large. With wings, they measure 12 to 16 mm, and their bodies range from reddish-brown to reddish-orange. Their wings are lightly creased along the vein paths, and the fore wings have enlarged veins near the body that distinguish them from all other Florida termites. These termites infest wood with high moisture content and swarm less predictably, usually in late summer and early fall.
Termites vs. Flying Ants
Many people spot a swarm and aren’t sure whether they’re looking at termites or flying ants. Three quick details settle it. First, look at the antennae: termites have straight, beadlike antennae, while ants have elbowed antennae that bend at a sharp angle. Second, check the waist. A termite’s body extends straight back from its head with no pinch or narrowing, while ants have a distinct “wasp waist.” Third, compare the wings. Termite wings are pale, translucent, and both pairs are roughly equal in length. Ant wings are tinted brown, and the front pair is noticeably longer than the back pair.
If you find a pile of small, translucent, equal-length wings on a windowsill or near a light fixture, those are almost certainly shed termite wings. Swarmers drop their wings shortly after landing and pairing up.
Physical Signs of an Active Colony
You may never see a live termite but still spot clear evidence of their presence. The signs differ by species.
Subterranean termites build mud shelter tubes, pencil-width tunnels made of soil and saliva, that travel up foundation walls, support piers, and plumbing. These tubes protect workers from open air as they move between their underground colony and the wood they’re eating. You might find them on exterior foundation walls, inside crawl spaces, or occasionally on interior walls and ceilings. Formosan termites sometimes build odd-shaped dried mud formations called “swarm castles” on walls or ceilings in late spring as they prepare to release swarmers. You may also notice BB-sized spots of dried mud on sheetrock or paneling, known as pinholes, where termites accidentally broke through the surface and patched it.
Drywood termites leave a different calling card: small, six-sided fecal pellets about the size of a grain of sand. These pellets are dry and uniform in shape, and they accumulate in tiny piles below “kick-out holes” where termites push waste out of the wood. Finding a neat cone of these pellets on a floor, countertop, or windowsill is a reliable indicator of drywood termite activity overhead.
When Florida Termites Swarm
Swarming in Florida is triggered by a combination of warmth, humidity, and daylight. A warm rain followed by a sunny afternoon is the classic trigger for eastern subterranean termite swarms in spring. Formosan termites respond to warm evenings after spring rains, taking flight at dusk.
Here’s the general schedule:
- Eastern subterranean termites: Late February through May, during daytime, especially after warm rain
- Asian subterranean termites: Mid-February through late May, at night
- Formosan subterranean termites: Early May through late June, at night near lights
- Drywood termites: Late summer into fall, early evening
- Dampwood termites: Late summer and early fall, less predictable timing
If swarmers are emerging directly from your walls, ceiling, or floor, that’s a strong sign the colony is inside the structure itself, not just nearby. Large numbers of swarmers indoors, or piles of shed wings inside the home, warrant a professional inspection regardless of which species you think you’re dealing with.