When Does a Homeowner See Termites? The Signs That Give Them Away

Most homeowners see termites at one of a few predictable moments: during a spring swarm, when they find piles of shed wings or tiny pellets, when mud tubes show up on the foundation, or when damaged wood is uncovered during a repair or a home sale. The rest of the time, termites stay out of sight inside wood, soil and their own tunnels.

That hidden lifestyle is the problem. According to the EPA, termites rarely emerge from the soil, mud tubes or wood they are tunneling through, and most people do not know they have them until they see a swarm or come across damage during construction. Florida has more established termite species than any other state, according to UF/IFAS, so in South Florida knowing those moments helps you catch a colony while the damage is still small.

Why Termites Stay Hidden Most of the Year

Termite workers are soft-bodied and lose moisture quickly in open air. Subterranean termites solve that by living in the soil and traveling inside mud tubes, while drywood termites spend their entire lives sealed inside the wood they eat. Either way, the colony is active all year, even when you see nothing.

UF/IFAS scientists point out that colonies are always active, even when no swarm is visible. A quiet house in December is not proof that termites are gone; it only means they are not showing themselves. That is why the signs below matter more than spotting a live insect.

Moment 1: A Termite Swarm

For many homeowners, a swarm is the first time they ever see a termite. Mature colonies send out winged reproductives, called alates or swarmers, to pair off and start new colonies. In South Florida, UF/IFAS says termite activity is most visible from March to June, with Asian subterranean termites swarming in early spring, drywood termites from about March or April, and Formosan termites from late April.

Swarms happen both outdoors and inside. Outdoors, you may see a cloud of winged insects around a porch light, a tree or a fence post. Indoors, swarmers come out of baseboards, window frames, door frames or light fixtures and fly toward windows and lamps.

What a swarm means depends on where and how many:

• A few swarmers near an open door or window may have flown in from outside, attracted by light.
• Hundreds or thousands of swarmers indoors usually indicate an infestation in the structure itself.
• Swarmers coming out of a wall, trim or a piece of furniture point to a colony right there.

The exact calendar differs by species. Our guide to when termite swarming season starts breaks it down month by month.

Moment 2: Piles of Discarded Wings

Swarmers break off their wings soon after landing, so the wings often outlast the insects. You find them on windowsills, in sinks and bathtubs, near sliding doors and under light fixtures. UF/IFAS notes that after indoor flights, native subterranean swarmers are usually found dead and dried near windows or in sinks and tubs.

Termite wings are all about the same length. Flying ants, which swarm at similar times of year, have front wings that are longer than the back ones, elbowed antennae and a pinched waist. If you are not sure which you found, compare them with our guide to termites vs. flying ants.

Moment 3: Tiny Pellets Piling Up (Drywood Termites)

Drywood termites keep their galleries clean by pushing their droppings, called frass, out through tiny “kick-out” holes. According to UF/IFAS research on the West Indian drywood termite, the pellets are six-sided in cross section and can be cream, red or black, and the kick-out holes are usually only 1 to 2 mm across. UF/IFAS scientists describe the droppings as looking like coffee grounds, typically found around windowsills.

Look for small piles under:

• Window and door frames
• Baseboards, crown molding and wood trim
• Wooden furniture, cabinets and picture frames
• Attic framing and exposed beams

Pellets that come back after you clean them up mean the colony is still active. The West Indian drywood termite is most common in older buildings in the southern half of Florida, so homes in Miami-Dade, Broward, Palm Beach and the Keys see it often.

Moment 4: Mud Tubes on the Foundation (Subterranean Termites)

Subterranean termites build pencil-width tunnels of soil and saliva, called shelter tubes or mud tubes, to travel between the ground and the wood in your home without drying out. UF/IFAS describes these tubes as built from the ground up, so look low first:

• Along the foundation and slab edge
• On block or stucco walls just above the soil
• Inside the garage, along the base of walls and in corners
• Around plumbing and utility lines where they enter the house
• Between siding and the foundation, and on fence posts or tree trunks near the home

A tube does not tell you whether the colony is still using it, so leave it in place and let a technician check it. Knocking it down only removes the evidence.

Moment 5: Damaged or Hollow-Sounding Wood

Termites eat wood from the inside, often leaving a thin outer surface intact. You may notice damage when you:

• Tap a baseboard or door frame and hear a hollow sound
• Push a screwdriver into wood and it sinks in easily; UF/IFAS and the EPA both suggest probing exposed wood this way
• See blistered, bubbling or peeling paint over wood
• Notice doors and windows that start to stick, or floors that feel soft

Some of these clues also appear with moisture problems, so it helps to know the difference between water damage and termite damage. For the clues that show up on walls and ceilings, see the silent signs of termites inside walls.

Moment 6: Remodeling, Repairs and Home Sales

Much termite damage is discovered by accident. The EPA notes that many people first come across termites during construction. Pulling up old flooring, removing a kitchen cabinet, replacing a door frame or opening a wall after a leak can expose galleries, soil-packed tunnels or carton nest material that has been building for years.

A home sale is the other common moment. Buyers in Florida often order a wood-destroying organism (WDO) inspection, and that report is often the first time a seller learns about old damage or an active colony. To see what that visit covers, read where termite inspectors look.

Moment 7: A Fallen or Hollow Tree After a Storm

In parts of South Florida, the first sign of invasive subterranean termites is not in the house at all. UF/IFAS reports that Formosan and Asian subterranean termites can consume living trees from the inside with few visible signs, weakening them until they fall in a storm. A tree that breaks open to reveal a hollow center packed with soil-like material, or with mud tubes on the trunk, is a warning that these termites are active near your home.

After hurricane season, look at any trees that came down on or near your property, and have trees close to the house checked during your next inspection.

Where You Are Most Likely to See Each Sign

Whichever sign you find, the species matters because treatment is completely different. Our comparison of drywood vs. subterranean termites explains how to tell them apart.

What to Do the Day You See Termites

Seeing termites is unsettling, but a calm, careful response helps more than a can of spray.

1. Do not disturb the evidence. Leave mud tubes, pellet piles and damaged wood as they are.
2. Collect a sample. Bag a few swarmers, wings or pellets and note where you found them.
3. Take photos of tubes, piles and damage, with something for scale.
4. Skip store-bought sprays. Killing the swarmers you see does nothing to the colony in the soil or the wood.
5. Book an inspection. A trained technician can confirm the species, find how far the activity reaches and recommend the right treatment.

How Toro Finds and Treats Termites

Toro’s termite control service starts with a free inspection: a trained technician identifies the termite species and checks how far the damage goes. From there, the treatment matches what you have. Subterranean termites are handled with the Sentricon baiting system installed around the property, localized drywood colonies can be treated with TORO-GUARD, a non-tenting treatment, and widespread drywood infestations call for tent fumigation.

Toro has protected South Florida homes since 1969, with technicians trained at the TORO Institute alongside on-staff entomologists, and every treatment is backed by the 110% Satisfaction Guarantee. To learn more about the termites you might find, browse the termite pest library.

Contact Toro today

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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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