Winged ant
Ants have elbowed antennae, a narrow waist and front wings longer than hind wings. Termite swarmers have straight antennae, broad waist and equal-length wings.
WOOD-DESTROYING INSECT GUIDE
Eastern Subterranean Termites
Reticulitermes flavipes
Eastern subterranean termites live in colonies associated with soil and feed on cellulose. The most recognizable building signs are mud shelter tubes, hollowed wood containing soil-like material, discarded equal-length wings and dark winged swarmers with a broad waist. Canada considers termites a regional structural hazard in southern Ontario, so suspicious evidence should be confirmed carefully rather than assumed from ant activity alone.
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QUICK FACTS
Identification at a glance
Species of concernEastern subterranean termite
Scientific nameReticulitermes flavipes
Colony locationPrimarily associated with soil
FoodCellulose in wood and other materials
Key evidenceMud tubes, wings and hidden wood galleries
Ontario statusRegional hazard in southern Ontario
OVERVIEW
What property owners should know
Subterranean termites are social insects with workers, soldiers and reproductive castes. Workers are the individuals that consume cellulose and can damage structural wood while remaining hidden from light.
A termite problem usually develops gradually. Damage may remain concealed behind finishes or inside structural members for years before a swarm, shelter tube or renovation exposes the activity.
Canadian conservation guidance identifies termites as a regional hazard in southern Ontario. That means a suspected termite at an Eastern Ontario property deserves evidence-based identification, not an assumption based only on winged insects near a window.
IDENTIFICATION
What to look for
01
Workers are soft-bodied and pale to creamy white
02
Soldiers have an enlarged darker head with strong jaws
03
Winged reproductives are dark and have two pairs of wings of approximately equal length
04
Termites have straight antennae and a broad waist rather than the narrow waist of ants
LIFE CYCLE & BIOLOGY
How the population develops
A mature colony produces winged reproductives that leave in a swarm and attempt to establish new colonies.
Workers forage through soil and protected shelter tubes to reach cellulose while avoiding drying conditions and light.
Colonies develop slowly compared with many household insects, but a long-established colony can damage substantial hidden wood.
HABITAT & HARBOURAGE
Where activity develops
- Soil around and beneath structures
- Wood-to-soil contact
- Foundation cracks and expansion joints
- Damp crawlspaces and lower structural members
- Tree stumps and buried wood close to buildings
Seasonality
Swarming often occurs during warm, humid spring conditions, but timing varies with local climate and building conditions. Hidden workers remain active below ground and inside protected wood beyond the visible swarm period.
VISIBLE EVIDENCE
Signs worth documenting
One clue rarely tells the whole story. The pattern, location and freshness of evidence help determine whether activity is current and where it is centred.
Earth-coloured shelter tubes on foundation walls or wood
Discarded piles of equal-length wings
Dark winged insects with broad waist and straight antennae
Wood that sounds hollow or breaks open to reveal layered galleries with soil-like material
Damage concentrated near lower structural areas or wood-to-soil contact
WHY IT MATTERS
Health, property and operational concerns
- Structural wood damage
- Long periods of hidden activity
- Confusion with harmless ant swarmers
- Moisture or construction conditions that support continued access
- Need for treatment methods that are site-specific and label-compliant
LOOK-ALIKES
Common identification mistakes
Carpenter ant
Carpenter ants excavate galleries in wood but do not eat it; their galleries are cleaner and may be associated with coarse sawdust-like frass.
Wood-boring beetle
Beetles typically leave exit holes and powder or frass rather than soil-coated termite galleries and shelter tubes.
INSPECTION
How we narrow down the source
A useful pest inspection connects the insect or rodent to harbourage, entry, food, moisture and building conditions.
01
Preserve wings or a specimen for identification
02
Inspect foundation walls, sill plates and lower structural wood for tubes
03
Check wood-to-soil contact and damp crawlspaces
04
Probe suspicious wood only where it is safe and appropriate
05
Look for moisture, grading and drainage conditions that keep lower wood damp
06
Avoid breaking every shelter tube before the extent of activity is assessed
PREVENTION
Reduce the conditions supporting activity
Correct wood-to-soil contact where practical
Keep structural wood dry through drainage and moisture repair
Remove buried scrap wood and cellulose debris beside foundations
Maintain access for foundation inspection
Seal construction gaps when appropriate after inspection
Have suspicious swarmers identified promptly
PROFESSIONAL CONTROL
What a thorough service plan should address
Product use is only one part of structural pest management. Identification, placement, sanitation, exclusion and follow-up determine whether the result lasts.
01
Confirm termites before recommending a termite treatment program.
02
Map active shelter tubes, structural conditions and likely soil access points.
03
Discuss treatment options such as registered soil treatments or baiting systems only when appropriate for the property and current Canadian labels.
04
Separate termite treatment from structural repair: damaged wood may require a qualified contractor or engineer depending on severity.
05
Schedule monitoring or follow-up based on the selected control method and evidence of continuing activity.
FAQ
Detailed questions property owners ask
Are termites found in Ontario?
Yes. Canadian federal references describe termites as a regional hazard in southern Ontario, but risk is not uniform across the province.
How do I tell termite swarmers from flying ants?
Termites have a broad waist, straight antennae and two pairs of wings that are about equal in length. Ants have a pinched waist, elbowed antennae and unequal wing pairs.
Do termites make sawdust?
Subterranean termites usually leave soil-lined galleries and shelter tubes rather than piles of clean sawdust. Coarse wood shavings are more characteristic of carpenter-ant excavation.
Does one winged termite mean the house is damaged?
One outdoor swarmer does not prove structural infestation. Swarmers emerging from inside a building, piles of shed wings, active mud tubes or live workers in structural wood are stronger evidence.
Can I just spray a visible mud tube?
Surface spraying a tube does not address the colony or the full foraging network. A termite program should be based on a complete inspection and a registered control method.
Should damaged wood be replaced immediately?
The infestation and structural condition should both be assessed. Pest control addresses the insects; repair decisions depend on how much strength the wood has lost and may require a building professional.
REFERENCE SOURCES
Where this information comes from
These pages are written by Emerald Pest Control from authoritative pest, public-health and extension references. They are not copied from competitor websites.
LOCAL PEST HELP
Need help with eastern subterranean termites?
Send us a photo or request an inspection. We can confirm the pest, identify the conditions supporting activity and explain the appropriate next step for your property.