A termite swarm is often the first thing a homeowner actually sees — and it's usually a sign that a colony has been established somewhere nearby for a while. Understanding what a swarm is, and what it isn't, helps you react to one sensibly instead of panicking.
Swarmers — properly called alates — are the winged reproductive members of a colony. They aren't the termites doing damage to your home; the workers are. Swarmers leave a mature colony to pair off and start new ones elsewhere. That matters for two reasons: a colony generally has to be well established before it produces swarmers at all, and every swarm is an attempt to found additional colonies in the surrounding area.
Our climate gives termites a much longer active window than most of the country, so swarming isn't confined to a single narrow month here. In broad terms, spring through early summer is the heaviest period, with warm, humid conditions and calm evenings after rain being typical triggers. Different species swarm at different times and times of day, which is part of why identification matters — drywood and subterranean species don't follow the same calendar, and Formosan subterranean termites have their own pattern. Our guide to drywood vs. subterranean termites covers how the two groups differ.
Many swarmers are drawn to light, which is why they turn up around porch fixtures, lanais, pool cages, and windows in the evening. A cluster of them indoors is more significant than a few outdoors: swarmers emerging inside the building usually means the colony is inside or under the structure, not somewhere out in the neighborhood.
Swarmers shed their wings shortly after they fly. Small piles of identical, translucent wings on windowsills, in sinks, along baseboards, or caught in spider webs are a stronger indicator than the insects themselves, because the wings stay put long after the swarm has passed. Along with frass, shed wings are one of the clearest pieces of physical evidence a homeowner can find without opening anything up.
A swarm confirms termite pressure. It does not, on its own, tell you where the colony is, how large it is, how long it has been there, or how much damage has been done — all of which affect what treatment makes sense. It also isn't something you can resolve by killing the swarmers you can see; vacuuming them up removes the nuisance but leaves the colony entirely intact.
Collect a few of the insects or wings if you can, note exactly where they appeared and roughly when, and leave the area otherwise undisturbed. That location information genuinely narrows down where to look. Then have the property evaluated so the species and the extent of activity can be established before any treatment decision — whether that ends up being tent fumigation, a no-tent drywood treatment, or a baiting system depends entirely on what's found.
Seeing swarmers or shed wings at your property? Call us at (888) 670-2532.