Wood & buildings

Termites

Swarms, tubes, pellets and damaged wood are clues that need interpretation. Record accessible evidence and obtain a qualified inspection. Species, extent and building conditions determine treatment; the visible hole or pellet pile is not the whole problem.

Latest source check 15 October 2026Source-led field guide

Match the organism, its setting and its signs. A photograph or a single symptom cannot confirm every species or cause.

Mounted termite swarmer, species not specified
Photographed exampleMounted termite swarmer, species not specified.Isoptera, species not specified
Identification limits & photo credit

The Cornell source identifies a winged termite without a species or collection location. This mounted specimen has overlapping wings and partly obscured body and antennae; it illustrates a swarmer's overall wing outline, not a complete waist, antenna or wing-count key. Do not infer a termite species, local distribution or infestation extent from it.

Mounted termite swarmer, species not specified. Photo: NY State IPM Program at Cornell University from New York, USA. CC BY 2.0. Original source · CC BY 2.0 & details

In this guide
Your first decision

Choose treatment after identification

For structural infestations, use a properly licensed provider. Ask why the proposed method fits the termite group and construction, what it reaches, and what it cannot reach.

Sources for this section

University of California Statewide IPM Program · US Environmental Protection Agency · University of Kentucky Extension

01 / Identify

Recognize the signs

Winged ant versus termite
Termite swarmers have a broad waist, straighter antennae and roughly equal-sized wings. Ants have a narrow waist, elbowed antennae and smaller hindwings. Keep a specimen where safely possible.
Activity versus historical evidence
Live termites confirm activity; old galleries, holes and tubes may remain. Drywood pellets can fall because of vibration, so a new pile is not by itself proof of a live colony or its extent.
Hidden damage
Much activity occurs inside timber, soil or inaccessible voids. Surface appearance cannot establish structural soundness. Do not probe compromised load-bearing material yourself.

Look more closely

Compare the labeled examples and their limits. Images are independently enlarged, not shown at a common scale.

Formosan termite swarmers captured on a monitoring trap
Photographed exampleFormosan termite swarmers captured on a monitoring trap.Coptotermes formosanus
Identification limits & photo credit

Multiple trapped swarmers with overlapping wings. This is a Formosan termite example, not a diagnostic plate for all termites; a swarmer does not establish the extent of structural infestation.

Formosan termite swarmers captured on a monitoring trap. Photo: Scott Bauer, USDA Agricultural Research Service. Public domain (U.S. government work). Use does not imply USDA ARS endorsement. Original source · Public domain (U.S. government work) & details

Sources for this section

University of California Statewide IPM Program · University of California Statewide IPM Program · University of Florida IFAS Extension

Differences that change the decision

A similar-looking organism can need a different response. Compare the evidence and what it changes.

Compare every column. On a narrow screen, scroll the table sideways.

TypeWhat to checkWhat changes
Subterranean termitesOften associated with soil, shelter tubes and moisture; feeding can be concealed behind intact surfaces.Inspection must consider soil-to-building routes and the whole structure. Professional bait or soil-treatment systems require an appropriate design and continuing service.
Drywood termitesLive within wood without requiring a soil connection; characteristic ridged pellets may be expelled through small openings.Compare localised versus whole-structure options. A spot treatment addresses known locations and may miss concealed colonies; confirm what the quoted scope covers.
Dampwood termitesDepend on very moist wood, often with decay or persistent wetting.Find and correct the moisture problem and assess affected timber. A soil barrier alone does not repair the sustaining condition.
Formosan subterranean termitesA Coptotermes species requiring expert identification; colonies may form carton material in voids and infest trees.Have the inspector assess building and relevant nearby tree activity. Do not apply another species' local swarm calendar or estimate colony size from one sighting.
Conehead termitesAbove-ground tunnels or nests and soldiers with dark cone-shaped heads warrant specialist identification.In Florida, use the FDACS Conehead Termite Eradication Program reporting route. Elsewhere contact the local plant-health or biosecurity authority for a suspected unusual introduced termite; do not move infested wood.
Sources for this section

University of California Statewide IPM Program · University of California Statewide IPM Program · University of Florida IFAS Extension · Florida Department of Agriculture and Consumer Services

What else could it be?

Carpenter ants

Ants excavate rather than consume wood and may leave coarse fibrous debris.

Compare carpenter ants

Wood-boring beetles

Round or oval emergence holes and powder differ from termite pellets, but expert debris examination may be needed.

Compare wood boring beetles

Decay or other damage

Soft or hollow wood is a reason for assessment, not a termite identification.

Sources for this section

University of California Statewide IPM Program · University of California IPM · University of California IPM

Inspect the right places

  1. Capture evidence without erasing the route

    Photograph tubes, holes or pellets with scale and a wider view of the location. Label a safely collected specimen. Keep a dated record for the inspector.

  2. Request a written inspection

    Ask which areas were accessible, what evidence supports the species and current activity, and where uncertainty remains. An inaccessible void should be recorded as a limit, not described as pest-free.

  3. Check conditions and history

    Provide previous treatment records, leaks, repairs and recent wood deliveries. Point out drainage, stored timber and wood-to-soil contact without entering hazardous crawlspaces.

Sources for this section

University of California Statewide IPM Program · University of Kentucky Extension

02 / Respond

Choose a proportionate response

For pesticides, the local product label determines the allowed pest, site, precautions and timing. Check safety and regional guidance.

  1. Choose treatment after identification

    For structural infestations, use a properly licensed provider. Ask why the proposed method fits the termite group and construction, what it reaches, and what it cannot reach.

  2. Compare the full contract

    Compare inspected scope, preparation, ongoing inspections, renewal costs, retreatment terms and whether damage repair is covered. A warranty to retreat is not necessarily a warranty to repair timber.

  3. Correct conducive conditions

    Repair leaks, maintain drainage and ventilation, and remove stored wood and debris against the building. Preserve required inspection access and comply with local building details.

  4. Separate pest control from repair

    Have damaged structural members assessed and repaired by qualified people. Fumigation or baiting does not restore lost strength, and treatment does not prevent every future introduction.

Turn these steps into your own checklist ↗
Sources for this section

University of California Statewide IPM Program · US Environmental Protection Agency · University of Kentucky Extension

Avoid these mistakes

  • Do not drill, trench, inject or fumigate a building yourself.
  • Do not buy a product that merely kills exposed termites and assume it provides structural protection.
  • Do not accept a definitive activity or damage estimate from pellets or one photograph.
  • Do not move suspect infested wood to another property.
Sources for this section

US Environmental Protection Agency · Florida Department of Agriculture and Consumer Services

03 / Follow through

Check whether it is working

When to look again

Use the inspection and servicing dates specified in the written treatment plan. Any personal reminder is editable and is not a scientific clearance interval.

Evidence of progress

Retain inspection findings, treatment records and follow-up evidence. A lack of swarmers does not establish control. Report new live insects or evidence to the provider and request reassessment.

Record an observation ↗

Get help when…

  • Arrange qualified inspection for indoor swarmers, tubes, pellets or suspected damaged timber.
  • Seek prompt structural assessment for sagging, instability or visibly compromised load-bearing wood.
  • Report a suspected invasive termite through the appropriate local authority.
Prepare for a professional inspection ↗
Sources for this section

University of Kentucky Extension · University of Florida IFAS Extension · Florida Department of Agriculture and Consumer Services

Prevent a return

  • Maintain drainage and repair plumbing or roof leaks.
  • Keep vents and inspection zones accessible.
  • Inspect incoming wood and avoid unnecessary wood-to-soil contact.
  • Retain records when renewing service or buying a property.
Sources for this section

US Environmental Protection Agency

Common questions

Does a swarm in the garden mean the house is infested?

Not automatically. Its location and identification matter. Indoor emergence or building evidence warrants a building inspection.

Is a cheaper spot treatment equivalent to whole-structure treatment?

No. They have different reach and uncertainty. Ask the inspector to explain concealed areas and the consequences of the narrower scope.

Can I compare quotes before deciding?

Yes. Request more than one inspected proposal and compare method, exclusions and warranty. Immediate safety concerns in damaged timber should be assessed separately.

Sources for this section

University of California Statewide IPM Program · University of Kentucky Extension

Check the evidence

Sources & scope

References retain their geography and dates. A source-check date is not a claim of independent specialist review.

  1. Subterranean and Other Termites

    University of California Statewide IPM Program. California, United States; termite groups, evidence and building inspection. Species ranges and seasons are local. Checked 2026-10-15.

  2. Drywood Termites

    University of California Statewide IPM Program. California, United States; pellet uncertainty and whole-structure versus local treatment. Checked 2026-10-15.

  3. Termites: How to Identify and Control Them

    US Environmental Protection Agency. United States; structural termiticide use and prevention. Checked 2026-10-15.

  4. Termite Control: Answers for Homeowners

    University of Kentucky Extension. Kentucky, United States; revised March 2026; consumer inspection, contracts and follow-up. Checked 2026-10-15.

  5. Formosan Subterranean Termite

    University of Florida IFAS Extension. United States with Florida emphasis; distribution maps dated 2024; expert identification and tree/structure activity. Checked 2026-10-15.

  6. Conehead Termite Eradication Program

    Florida Department of Agriculture and Consumer Services. Florida, United States; specific reporting programme, not a worldwide distribution statement. Checked 2026-10-15.

  7. Wood-Boring Beetles in Homes

    University of California IPM. Wood damage and debris comparison; historic pesticide recipes excluded. Checked 2026-10-15.

  8. Carpenter Ants

    University of California IPM. Western US carpenter-ant excavation and debris, for comparison with termites. Checked 2026-10-15.

Individual medical or veterinary diagnosis, structural assessment, uncertain species identification and local treatment permissions require the appropriate professional. About our editorial process.