Written by Michael Cadenhead, ACE — Associate Certified Entomologist (Entomological Society of America), Licensed Pest Control Operator (FDACS), CEO of Cadenhead Services, Inc. (est. 1983). 40+ years of field experience in termite management across Florida.
If you live in Crestview, Milton, Freeport, or anywhere in Northwest Florida and you see a sudden cloud of winged insects inside or outside your home — stop and read this before you do anything else. You may be witnessing a termite swarm, and what you do in the next few hours matters.
What Is a Termite Swarm?
A termite swarm happens when a mature colony releases hundreds or thousands of winged reproductives (called alates) to fly off and start new colonies. This is how termites spread. It usually happens on warm, humid days — often after rain — and in NW Florida, the primary swarm season runs from January through July, with peak activity March through June.
Seeing a swarm does not mean your house is about to collapse. But it does mean there is a mature termite colony nearby, and if the swarm is inside your home, it means termites have already been eating your structure for several years.
Swarm triggers are specific, not random. Research has established that Eastern subterranean termite flights are set off by a convergence of conditions: soil temperatures rising above approximately 68–72°F, a recent rainfall event, low wind, and increasing daylight hours. This is why swarms in NW Florida tend to happen in the afternoon, 1–4 days after a rain, on the first genuinely warm days of late winter or early spring.
(Not sure if what you saw is termites or flying ants? See our guide on how to tell flying termites from flying ants.)
Is It Termites or Flying Ants? Quick Visual Guide
This is the most common question during swarm season. Here's how to tell them apart at a glance:
The fastest test: If the wings are all the same size, and you're finding shed wings in a pile near a window or baseboard — those are termites. Ants don't shed wings this way.
Waist: Termite swarmers have a straight body with no pinch. Flying ants have a pinched, narrow waist.
Wings: Termite swarmers have 4 wings of equal length that shed immediately after landing. Flying ants have front wings longer than back wings.
Antennae: Termite antennae are straight and beaded. Flying ant antennae are elbowed or bent.
Color: Termite swarmers are pale, translucent, to dark brown. Flying ants are dark brown to black.
The 3 Termite Species Swarming in NW Florida Right Now
Not all termites swarm at the same time. In the Crestview, Milton, and Freeport area, three species are active during different parts of the season — and understanding the difference matters, because the threat level scales dramatically with colony size.
1. Eastern Subterranean Termites (Reticulitermes flavipes)
The most common termite in the Florida Panhandle. Eastern subterranean termites swarm from January through May, with peak activity in March and April after a warm rain — typically midday to early afternoon.
Colony size: A typical mature colony ranges from 60,000 to 300,000 workers, though established colonies in the South regularly reach 1 million or more (Animal Diversity Web; GBIF species record). They live underground and commute to your structure via mud tubes — pencil-width tunnels built from soil, wood particles, and saliva. Because the colony source is underground, treating the wood alone does not stop the feeding.
They can forage up to 100 meters (about 330 feet) from the colony center (UF IFAS Extension, EENY-121, citing King & Spink 1969; Su & Scheffrahn 1988), meaning a colony on a neighboring property or in a nearby tree stump can reach your foundation without any visible sign on your property.
2. Formosan Subterranean Termites (Coptotermes formosanus)
An invasive species and the most destructive termite in the world. Formosan termites swarm from May through July, at night, and are strongly drawn to lights — exterior fixtures, lit windows, and street lighting. If you see a large swarm hitting your porch lights or exterior bulbs on a warm May or June evening, Formosan termites should be your first suspect.
Colony size: A mature Formosan colony contains several million workers — UF IFAS Extension (EENY-121) describes colonies as "several million individuals" with a foraging range of up to 100 meters in the field. At full foraging scale, wood consumption rates are substantial enough that large established colonies can cause significant structural damage within 2–5 years. The 13 oz/day figure circulates widely in extension literature but should be treated as an approximation; the verified fact is that Formosan colonies are orders of magnitude larger than Eastern subterranean colonies.
Formosan termites are an emerging pressure across the Panhandle, with populations spreading along the I-10 corridor from the Gulf Coast.
3. Southeastern Drywood Termites (Incisitermes snyderi)
Unlike subterranean termites, drywood termites live entirely inside the wood they infest — no soil contact required. They swarm from June through July, usually in late afternoon. They are less common than subterranean species but can infest structural wood, furniture, window and door frames, and trim.
Colony size: Mature drywood colonies typically have fewer than 3,000 members (Veseris Pest Management Reference; Kalotermitidae literature). Winged reproductives are not even produced until the colony is at least 4 years old.
Why Colony Size Is Everything: Understanding the Real Threat Scale
Most people assume Formosan termites are more aggressive because they are a more vicious or faster-moving bug. That is not quite right. The real difference between these three species comes down to one number: how many mouths are feeding on your home at the same time.
Think of a termite colony as a factory. More workers in the factory means more production. Here, production means destruction.
Southeastern Drywood Termites: Up to ~3,000 members per colony. Wood consumed: minimal — just ounces per month. Time to significant structural damage: 5–10+ years, slow and localized.
Eastern Subterranean Termites: 60,000 to 1 million+ members per colony. Wood consumed: ounces per day at scale. Time to significant structural damage: 3–8 years across multiple entry points.
Formosan Subterranean Termites: Several million+ members per colony. Wood consumed: high — proportional to colony size. Time to significant structural damage: 2–5 years; worst cases documented in under 2 years.
A Formosan colony at full size has roughly 3,000 times more workers than a drywood colony. That's not a different species — that's a different category of threat entirely.
The good news: none of this damage happens overnight. Colonies take years to reach destructive size. That window is exactly when professional monitoring and baiting systems can stop the problem entirely rather than just treating its symptoms.
Month-by-Month: When Each Species Swarms in NW Florida
January – February: Eastern subterranean termites begin early swarms on the first warm days (above 68–70°F) following rain. Activity is light but real — don't assume you're safe because it's winter.
March – April: Peak Eastern subterranean activity. The majority of service calls during swarm season happen now. Swarms typically occur 1–4 days after rain when daytime temps hit 70–75°F or higher, usually midday.
May: Transition month. Eastern subs taper off; Formosans begin. Watch for evening swarms concentrated around exterior lights starting mid-May.
June – July: Formosan peak continues. Drywood termites also active, swarming in late afternoon. Night swarms around lights during this period should be treated with urgency.
August – December: Swarm activity drops significantly but colonies continue feeding year-round. Florida's mild winters do not give termite colonies a dormant period the way northern climates do. Feeding continues through fall and winter at reduced rates.
Step-by-Step: What to Do When You See a Termite Swarm
The swarmers themselves do not eat wood. They are reproductives looking for a place to start a new colony. About 99% of them die before ever establishing one. The swarm is not the immediate danger — the colony it came from is.
Spraying termite swarmers with bug spray will not solve the problem and can actually make a professional inspection harder. The swarmers will die on their own within hours — the real issue is the colony they came from.
If you can safely collect 5–10 of the insects, put them in a sealed plastic bag. A licensed pest control professional can use these to identify the species, which determines the correct treatment approach. Species identification matters — the treatment for Formosan termites is different from Eastern subterranean treatment.
Document where the swarm is coming from — a wall, a window, a crack in the slab, a tree stump, or from the ground. This helps the inspector locate the colony. Do not disturb the area — leave mud tubes, wings, and debris intact.
(If you find discarded termite wings inside your home, that is also important evidence — photograph those too.)
You have a 24 to 48 hour window before the swarmers disperse and the evidence becomes harder to trace.
What Termite Damage Actually Looks Like
Most termite damage is hidden for years before it becomes visible. Here's what to look for during your own walk-around:
Indoor Swarm vs. Outdoor Swarm — Why It Matters
This means termites are already inside your structure. A mature colony does not swarm until it has been established for 3 to 5 years. By the time you see swarmers indoors, there may already be significant hidden damage behind walls, under floors, or in your attic. This requires immediate professional assessment — not next week.
This indicates a colony in the soil, a nearby tree, or a stump. It does not necessarily mean your home is infested yet, but it does mean there is active pressure on your property. Subterranean termite colonies can forage up to
Why NW Florida Is Ground Zero for Termite Swarms
According to the University of Florida IFAS Extension, Florida leads the nation in termite damage, with estimated costs ranging from $500 million to $1 billion annually. NW Florida's combination of warm temperatures, high humidity, sandy soil, and heavy rainfall — 60+ inches per year in many Panhandle counties — creates ideal conditions for termite colonies to thrive and remain active year-round.
Research on active termite colonies documents that colonies maintain internal temperatures of 31–32°C (88–90°F) with relative humidity of 94–95% (Chan et al., 2011). NW Florida's ambient summer environment naturally approximates these conditions, meaning colonies here don't need to work to regulate their environment the way colonies in drier or colder climates do. The result: faster growth, more workers, and more pressure on your home.
Local evidence of the threat is not theoretical. In February 2018, the Star Pavilion at Rosamond Johnson Beach in Santa Rosa County — a structure within Gulf Islands National Seashore — was demolished due to termite damage so extensive the building could not be safely repaired. This was a professionally maintained public structure. Across Okaloosa and Santa Rosa counties, termite damage to public structures has led to increased inspection requirements and costly repairs — a trend that local pest control professionals and building officials have observed accelerating in recent years.
Sandy soil: Drains quickly but stays moist at depth — ideal for subterranean termite tunneling.
River basins: The Blackwater River and Yellow River basins create high ambient humidity corridors through eastern Santa Rosa and Okaloosa counties.
Formosan range expansion: Formosan termites have been expanding their range steadily westward from the Gulf Coast, with established populations now documented in Pensacola and the surrounding region.
Mild winters: The Gulf Coast's mild winters mean termite colonies never enter the extended dormancy that limits colony growth in northern states.
What About Treatment? Bait Systems vs. Liquid Treatments
There are two primary approaches to termite treatment, and NW Florida's unique conditions make the choice especially important:
Liquid soil treatments create a chemical barrier in the soil around and under your home. They provide immediate protection but degrade over time — and NW Florida's sandy soil and heavy rainfall accelerate that breakdown, sometimes significantly within the first 2–3 years. Liquid treatments also do not eliminate the colony; they only block access to your structure.
Bait systems (like Sentricon® Always Active) use stations placed around your structure. Foraging termites consume the bait and bring it back to the colony, eventually eliminating it entirely. Research confirms that Formosan subterranean termites can forage up to 100 meters (330 feet) in the field (King & Spink 1969; Su & Scheffrahn 1988, cited in UF IFAS Extension EENY-121), meaning colonies on neighboring properties or in nearby trees can reach your foundation. Properly spaced bait stations intercept foraging workers before they reach your structure. This approach is particularly effective against Formosan termites, which are known to bypass liquid barriers through gaps in application.
Read our deeper comparison: Sentricon vs. liquid termite treatment.
Florida Law and Your Home
Under the Florida Building Code (8th Edition, 2023), termite protection is mandatory on all new construction. The Florida Department of Agriculture and Consumer Services (FDACS) requires annual inspections for most active treatment types.
Important for homebuyers: Most mortgage lenders require an active termite bond (Wood Destroying Organism inspection, or WDO) for home purchases in Florida. If you are buying or selling a home in Crestview, Milton, Freeport, or anywhere in NW Florida, a current termite inspection is typically required before closing. Cadenhead Services is licensed to perform WDO inspections — contact us to schedule.
Important for homeowners: Standard homeowners insurance policies in Florida explicitly exclude termite damage. There is no coverage for repair costs, structural remediation, or replacement of damaged materials. The average termite repair bill in Florida ranges from $3,000 to $8,000, and severe infestations involving structural members can cost significantly more. Prevention is the only financial protection available.
Already Have Bait Stations? What You Need to Know
Many homeowners have termite bait stations already installed by a previous company. Stations only work when they are actively monitored and baited. If your previous pest control provider went out of business, raised prices, or you let service lapse — your stations may be empty, expired, or no longer effective.
Cadenhead Services can inspect and service existing bait station systems, regardless of who originally installed them. If you are not sure whether your current termite protection is active, call us at (850) 682-4333 for an honest assessment.
Schedule a Free Termite Inspection in Crestview, Milton, or Freeport
Cadenhead Pest Control has been protecting homes in Crestview, Milton, Freeport, and throughout Northwest Florida since 1983. Our licensed technicians identify the termite species, locate the colony source, and recommend the most effective treatment for your specific situation — not a one-size-fits-all solution.
We offer both Sentricon® Always Active bait systems and liquid barrier treatments, and we will give you an honest assessment of which approach is right for your home and property.
If you see a termite swarm — inside or outside — call us at (850) 682-4333 or request a free termite inspection online. Same-day inspections are available during swarm season.
