Research source: UF/IFAS Featured Creatures: Eastern Subterranean Termite — University of Florida Institute of Food and Agricultural Sciences
Reticulitermes flavipes is the most common termite in Florida and, measured by total structural damage across North America, one of the most economically significant insects on the continent. Colonies live underground, forage for wood and cellulose above ground, and are typically invisible until they've been feeding for months or years. By the time most homeowners see evidence, significant damage has already occurred.
Identification Guide
Warning Signs of Subterranean Termite Activity
Pencil-width tubes along foundation walls, block piers, or framing. May run vertically or horizontally. Active tubes contain live termites.
Tap baseboards, door frames, or floor joists — a hollow thud instead of solid knock indicates internal galleries.
Winged termites near windows or light fixtures in spring, or piles of shed wings along window sills — indicates a mature colony nearby.
Paint lifting, warped wood surfaces, or wood that appears water-damaged without a water source present.
Eastern subterranean termites do not leave obvious frass (sawdust-like waste) like drywood termites — the absence of frass does not mean no infestation.
Termite damage can cause structural shifting that makes doors and windows suddenly difficult to open or close.
Eastern Subterranean vs. Formosan Termite
| Feature | Eastern Subterranean | Formosan |
|---|---|---|
| Origin | Native to North America | Invasive from Asia |
| Colony size | 60K–1 million workers | 1–10 million workers |
| Daily wood consumed | ~1 gram per 1,000 workers | ~13 grams per 1,000 workers |
| Above-ground colony? | No — requires soil contact | Yes — can build carton nests above ground |
| Swarm time (FL) | Morning, Feb–May | Evening, April–June |
| FL distribution | Statewide | Miami-Dade, Broward, Palm Beach primarily |
| Damage speed | Slow — months to years | Fast — extensive damage in weeks |
Frequently Asked Questions
What is the eastern subterranean termite?
Reticulitermes flavipes is the most widely distributed termite species in North America and the most common termite found in Florida. It lives in underground colonies that can number from a few thousand to over a million workers. It obtains moisture from the soil while foraging above ground for wood, building mud tubes — the telltale diagnostic sign — to maintain humidity as it travels between soil and food source. Unlike the Formosan termite (a separate invasive species), eastern subterranean termites are native to North America.
How is the eastern subterranean termite different from Formosan termites?
Both are subterranean species (they live underground and build mud tubes), but they differ in important ways. Formosan termites (Coptotermes formosanus) are an invasive species from Asia with colonies that can reach 10 million workers — far larger than eastern subterranean colonies. Formosans also produce carton (a paper-like material) and can build above-ground colonies in wood without soil contact. Eastern subterranean termite colonies are smaller (typically 100,000–1 million workers) and require soil contact. However, eastern subterranean termites cause more total damage in North America simply because they are so widespread.
How do I know if I have subterranean termites?
The most reliable diagnostic sign is mud tubes — pencil-width tubes of mud built along foundation walls, joists, piers, or any surface between soil and wood. These tubes protect termites from light and dehydration as they travel. Other signs include: wood that sounds hollow when tapped; blistered or warped wood surfaces; swarmers (winged reproductives) or shed wings near windows or entry points in spring; and unexplained cracks along paint lines in wood. Termite damage is often invisible externally until structural members are significantly compromised.
When do subterranean termites swarm in South Florida?
Eastern subterranean termite swarms in South Florida typically occur in spring — usually February through May — triggered by warm temperatures and rain. Swarms consist of winged reproductives (alates) that emerge in the hundreds from established colonies to mate and establish new colonies. The swarm itself is short-lived (30–60 minutes), but finding swarmers indoors near windows or light fixtures is a strong indicator of an active colony in or near the structure. In South Florida's warm climate, termites can remain active year-round.
Can I treat subterranean termites myself?
Effective subterranean termite treatment is not practical as a DIY project. The two professional methods — liquid barrier treatments (termiticide applied to the soil around and under the foundation) and baiting stations (slow-acting cellulose bait that workers carry back to the colony) — require specialized equipment and knowledge of soil conditions, construction type, and product application. Over-the-counter products create spotty coverage that creates a false sense of security while colonies continue feeding undetected.
How long does subterranean termite treatment last?
Liquid termiticide barriers using repellent products (Termidor HE, which uses fipronil) typically remain effective for 5–10 years in South Florida's soil conditions. Annual inspections are important to catch any gaps in the barrier. Baiting station programs require quarterly service — stations must be actively monitored and bait replenished as colonies consume it. Our subterranean termite protection program uses Sentricon baiting stations with annual inspection and monitoring.
Concerned About Termites?
FL License JB313837 includes Wood Destroying Organisms (WDO) — the category that covers termite inspection and control. Serving Boca Raton, Fort Lauderdale, and 28+ South Florida communities.