Termite swarmers have a thick, straight waist, two pairs of equal-length wings and straight antennae. Flying ants have a pinched waist, longer front wings and bent antennae.
Why it matters
Both show up indoors on warm spring days, often in the same week. Flying ants are mostly a nuisance, though carpenter ants can damage wood.
Termite swarmers mean a colony is feeding on wood nearby. The sooner you know, the sooner you can act.
A swarm of winged insects can look alarming, and many people spray first and ask questions later. Take a breath and take a close look instead.
Both groups start new colonies by sending out winged reproductives. That is why the insects appear suddenly and then vanish.
Check the waist
Termites have a thick, straight waist, so the body looks like one smooth, rounded shape. Ants have a pinched, narrow waist between the body sections.
This is often the easiest clue, especially if you have a magnifier or a phone camera to zoom in.
Try to look at the body from the side. A termite looks like a straight, uniform line, while an ant looks like it has three distinct parts.
Write down what you see, including when and where. Notes about the date, room and weather help a professional.
Check the wings
Termite swarmers have two pairs of wings that are the same length, and the wings drop off easily. You may find small piles of wings on sills or floors near windows.
Flying ants have front wings that are longer than the back wings. They don’t usually shed them in piles.
Another clue is the color of the wings.
If you only have a few wings and no insects, that is still useful. Shed wings by a window are a common clue that swarmers have been inside.
Check the antennae
Termite antennae are straight, like a string of beads. Ant antennae are bent at an elbow.
Together, the waist, wings and antennae give you three checks. If your insects fail any of them, treat the find seriously.
It can help to compare them with a ruler or coin in a photo. Scale makes it easier for a professional to identify them from a picture.
When and where swarmers show up
In Delaware, the eastern subterranean termite is active statewide and often swarms on warm days after spring rain. Swarmers often gather around windows and light fixtures, since they are drawn to light.
Swarmers inside the house usually mean an active colony nearby, possibly in the structure. Swarmers outside do not always mean a problem, but they are a good reason to look around.
Swarming usually lasts only a short time, so you may find only dead insects and wings later. Keep what you find.
Swarmers are attracted to light, so you may find them on windowsills or around lamps. A swarm outdoors near a tree stump or woodpile may simply be a nearby colony.
Other clues to look for
Swarmers are only one sign. Check foundations, crawl spaces and basement walls for other evidence.
Termites and carpenter ants both damage wood but in different ways. Termites eat it, while carpenter ants tunnel through it to nest, leaving smooth galleries and frass.
- Mud tubes running up foundation walls or piers
- Soft, hollow-sounding or blistered wood
- Discarded wings near windows and doors
- Sawdust-like frass from carpenter ants
What to do
Save a few in a sealed bag or jar, and snap a clear photo to use with the AI bug identifier on this site. Don’t spray them. Spraying kills the evidence, and swarmers are not the colony.
Then call for an inspection. A professional can confirm what you have and recommend a plan.
Avoid disturbing mud tubes or damaged wood before an inspection. Leaving them in place helps the inspector see what is going on.
Take photos of any damaged wood or tubes from a few angles, and add something for scale, such as a coin. Clear photos let a professional give you better advice before they arrive.
Who to call
If the insects turn out to be termites, Mosquito & Pest Authority can confirm it and recommend treatment before damage spreads. They also perform termite and WDI inspections across all three Delaware counties. Call 302-242-5254, and bring your sample or photo.
The inspection is also a chance to ask about prevention, including moisture control and keeping wood away from soil. Early action is usually less costly than waiting.
Common questions
Are termites covered by homeowners insurance?
Usually not. Most standard policies exclude termite damage, but policies vary, so check yours or ask your agent.
Do swarmers mean the house is infested?
Swarmers indoors usually mean a colony is nearby, possibly in the house. An inspection is the only way to know for sure.
Should I spray the swarmers I find?
It is better to save a few for identification. Spray won't reach the colony, and a professional can use your sample to confirm what you have.