In this guide
Quick answer
Look at three things. Termites have straight antennae, a thick waist with no pinch, and four wings of equal length that are much longer than the body. Flying ants have bent (elbowed) antennae, a narrow pinched waist, and front wings that are clearly longer than the back wings. Termite swarmers also shed their wings easily, so piles of identical wings are a strong termite sign.
Every spring, homeowners see a cloud of winged insects and panic. Sometimes it’s termites; often it’s ants. Both swarm to mate and start new colonies, both can appear inside, and from a distance they look the same. Up close, they’re easy to tell apart — and the difference matters, because one can damage the structure of your home.
The 3-point check
| Feature | Termite swarmer | Flying ant |
|---|---|---|
| Antennae | Straight, like a string of beads | Bent at an “elbow” |
| Waist | Thick, uniform body — no pinch | Narrow, pinched waist |
| Wings | Four wings of equal length, about twice the body length | Front wings longer than back wings |
| Wing shedding | Wings break off easily; piles left behind | Wings stay on longer |
| Color | Usually dark brown or black body, pale cloudy wings | Varies: black, brown, reddish |
Tip: use your phone
Put one insect in a clear zip bag or on white paper and take a photo with your phone’s zoom or macro mode. The antennae and waist are easy to see in a magnified photo. Keep the sample — a pest professional can confirm the species in seconds.
When and where each one swarms
Subterranean termites usually swarm on warm, calm days in spring, often after rain, and often in the morning or early afternoon. Formosan termites swarm in the evening in late spring and summer and are attracted to lights. Drywood termites tend to swarm in late summer and fall.
Ants swarm at many times of year depending on the species. Carpenter ants — the ants that do damage wood — commonly swarm in spring.
Seeing either insect indoors, especially coming out of walls, floors, window frames or a bathroom, is the important part. An indoor swarm usually means the colony is in or under the house.
What if they’re termites?
Treat it as a sign of an established colony. Don’t spray the swarm — it won’t affect the colony and can make inspection harder. Collect a few insects or wings, photograph where they appeared, and book a professional inspection. Our 12 Signs of Termites guide shows what else to check, and Termite Treatment Cost explains what to expect when quotes come in.
What if they’re ants?
Most flying ants are harmless and simply looking for a new home. The exception is carpenter ants, which are large (often 1/4 to 1/2 inch), usually black or black-and-red, and hollow out damp or damaged wood to nest. Unlike termites, carpenter ants don’t eat wood; they push out coarse sawdust-like shavings mixed with insect parts.
If carpenter ants are swarming inside, look for:
- piles of fine sawdust below wood, especially near windows or areas with past leaks;
- rustling sounds in walls at night;
- wood that is damp or rotting — fix the moisture and the ants lose their nest site.
For common kitchen ants, see How to Get Rid of Sugar Ants.
Quick decision guide
- Straight antennae + thick waist + equal wings → termites → book an inspection.
- Elbowed antennae + pinched waist + unequal wings → ants.
- Large black ants + sawdust piles → carpenter ants → find and fix moisture; consider a pro.
- Small ants, no damage → bait and seal entry points.
Frequently asked questions
Do flying termites bite?
Will a termite swarm go away on its own?
Should I kill flying ants with spray?
Sources
- US EPA — Termites: how to identify and control them
- University of Kentucky Entomology — Termite control around the home
- UC Statewide IPM Program — Pest Notes: Carpenter ants
