Eastern Subterranean Termite

Reticulitermes flavipes

What is this page for, given that we do not treat termites?

It is for the twenty minutes before you call anybody, and it is the only place on this site where termites appear at all.

Graduate Pest Control does not do termite work. Ryan Katz answered that question in one sentence and it is not a soft no: if the insect in your wood is a termite, this is not the firm for the job, and you want a company whose practice is built around that animal. Saying so on the page people actually land on is more useful than saying it on the phone after somebody has taken a morning off work.

What we can do, and what the rest of this page does, is settle which insect you are looking at. That matters more than it sounds, because the realistic shortlist here has two names on it and only one of them is a termite. The other is the black carpenter ant, and carpenter ants are core work at this firm. In spring the two produce winged reproductives in the same weeks, at the same windows, in houses carrying the same underlying fault, and a homeowner who guesses wrong loses a season in either direction. Guess termite when it is an ant and you buy soil work for a problem living in a wet band joist. Guess ant when it is a termite and you leave a colony in contact with the structure while chasing a leak.

So this is an identification page, written from published extension sources, and it ends by saying what happens next in each case. Nothing on it is a pitch for termite treatment, because there is nothing here to pitch.

What is the fastest way to separate a termite from a carpenter ant?

Three features on the insect itself, in descending order of how quickly they settle it.

The waist. This one works with the naked eye and it works in about two seconds. Cornell IPM frames the difference as ants having three distinct body regions while a termite’s thorax and abdomen are not well defined, and University of Kentucky entomology describes the termite as having a uniformly thickened waist against the ant’s constricted one. Held sideways against something pale, an ant looks like two separate objects strung on a thread. A termite has no such pinch anywhere along it — the outline runs straight from the back of the head to the tip of the abdomen. Cornell Cooperative Extension in Nassau County puts the same contrast the other way round, describing the carpenter ant’s very narrow waistline against the termite’s broad one.

The antennae. Cornell Cooperative Extension describes termite antennae as resembling a string of beads and ant antennae as clearly elbowed. That is a good description of what you actually see: on a termite the antenna comes straight out of the head and is built of small rounded segments in a row, while on an ant there is one long basal segment, then a definite bend, then the rest — a jointed arm rather than a necklace. University of Kentucky entomology and University of Maryland Extension both give the same straight-versus-elbowed split.

The wings, if it still has them. Termite wings are all the same size. That is stated flatly by University of Kentucky entomology, by University of Maryland Extension and by Cornell IPM, which describes the reproductives growing two pairs of translucent wings for swarming in spring. Ant wings are not: Penn State Extension has the front wing of a reproductive ant longer than the hind wing, and University of Minnesota Extension says the same in reverse, with hind wings shorter than front wings.

Color is the feature people reach for first and it is the weakest of the set. University of Maryland Extension gives the winged termite as about a quarter of an inch long and black; Cornell IPM gives the dark brown to black kings and queens as three-eighths to half an inch, nine to roughly thirteen millimeters. Penn State Extension gives carpenter ant workers as a quarter to half an inch, dark shiny brown to black, with winged reproductives up to three-quarters of an inch. Read those figures together and the honest conclusion is that a dark insect somewhere between a quarter and half an inch long could be either one. Size and color narrow nothing. The waist decides it.

What do the shed wings on the sill tell you?

Often everything, and they are frequently the only evidence a household ever finds.

University of Kentucky entomology describes the sequence: swarmers fly, drop to the ground, shed their wings, pair off and attempt to start colonies in the soil. The wings come off deliberately and almost immediately, which means the physical residue of a swarm outlives the swarm itself by weeks. University of Maryland Extension describes what that residue looks like indoors — piles of silvery, membranous wings, all about a quarter inch long, on floors, on windowsills or caught in spider webs. Cornell Cooperative Extension in Nassau County gives the same quarter-inch measurement for discarded wings, and Cornell IPM notes that the wings breaking off are themselves a tell-tale sign of a newly established colony.

The diagnostic value is in the uniformity. Four wings of one length, one shape and one color, collected in a window track or drifted along the top of a baseboard, is a termite signature. A carpenter ant sheds a set that is visibly mismatched, because the front pair is the longer pair. If you can find four wings from a single insect and lay them side by side, you have the answer without ever seeing a body.

Two practical notes. First, the place the wings collect is not necessarily where the insects came from — they head for light, so a cellar window well or a south-facing sash accumulates wings from anywhere in the room. Second, a swarm indoors and a swarm in the yard are not the same finding. University of Kentucky entomology points out that the indoor swarmers are themselves incapable of damaging wood and live only about a day, so the alarming cloud in the kitchen is not the problem; what it implies about the location of the colony is. Cornell Cooperative Extension notes that over ninety-nine per cent of swarmers fail to establish anything at all, and Cornell IPM notes that a colony needs several years to produce winged termites in the first place. Put those together and the meaning of an indoor swarm is plain enough: it is a statement about the age and the position of something already present, not about the insects you are sweeping up.

Mud tubes or frass — what is on the wall?

The building evidence separates the two even more cleanly than the insects do, because they leave opposite things behind.

Mud tubes belong to termites and to effectively nothing else here. Cornell IPM describes them as long, narrow strings of dry mud created as sheltering tunnels on foundation walls, and gives the function: protected runways letting workers move between the food source and the underground nest. The dimensions vary more than people expect. University of Kentucky entomology gives them as typically about the diameter of a pencil and sometimes thicker; Cornell Cooperative Extension in Nassau County describes a range running from the size of a wheat straw to wider than a person’s thumb, appearing on foundations, basement walls, posts and window frames. What every version has in common is that it is built of soil, and a vertical line of soil on a foundation wall is not an ambiguous finding.

Whether a tube is live is a separate question from whether it is there. University of Kentucky entomology gives the standard check: break the tube open and see whether workers are still inside. Dried mud persists long after the traffic that built it, so an intact tube is a record of activity rather than proof of it. Take out a short section, note the date, look again in several days.

Frass belongs to carpenter ants. Penn State Extension describes it as piles of coarse, stringy wood particles mixed with dead insect parts and other debris. Both halves of that are diagnostic. The material is stringy rather than powdery — recognizably shredded wood, nearer to pencil shavings than to sawdust — and it carries the colony’s refuse in it, which is why insect fragments turn up in the pile. Termites produce nothing comparable, because they are eating the wood rather than evicting it and there is no spoil to dump.

The geometry of frass is as useful as the substance. It falls straight down out of a slit in a gallery, so a drift of it on a windowsill, a cellar floor or the flat of a porch beam is pointing vertically at the nest above it. Sweep it up, mark the date, and see whether it comes back. That test costs nothing and answers the only question that matters at that stage, which is whether the gallery overhead is still being worked.

What do the galleries and the damaged wood look like when the member is opened?

Different enough that a chisel settles the argument even when the insects are long gone.

University of Kentucky entomology describes termite-damaged wood as hollowed out along the grain, with bits of dried mud or soil lining the feeding galleries. Two things are packed into that sentence. The first is directional: the loss follows the grain, taking the softer growth and leaving the denser layers, so a cut section reads as layered or laminated rather than as a round hole. The second is the lining. University of New Hampshire Extension puts the contrast head-on, describing carpenter ant galleries as clean with smooth walls and termite galleries as packed with a mud-like deposit.

Carpenter ant workings are the photographic negative of that. Penn State Extension describes their tunnels and galleries as smooth-sided and containing no soil particles or fecal pellets; University of Minnesota Extension describes them as smooth with a well-sanded appearance and notes there is no sawdust left inside, because the ants carry the spoil out instead. A gallery that looks as though somebody went over it with fine abrasive paper, with nothing in it, is an ant gallery. A gallery with earth in it is a termite gallery. There is no third reading.

What about sound? The tap test is worth doing and worth understanding correctly. Running a tool handle along a sill plate, a band joist or a porch beam and listening for the note to drop from solid to hollow finds loss of section that looking will never find, which matters because both insects work inward and leave a thin intact outer face that takes paint perfectly well. Following the dull spots with an awl confirms it. But be clear about what the sound has told you. It has told you the member is hollow; it has not told you what hollowed it. The insect question is answered by what is inside the void once it is open — smooth and empty, or lined with soil — and by what is on the wall outside it.

When does each one swarm, and what else does the calendar say?

The overlap is the entire reason this page exists.

For termites, the published windows differ slightly by source and both are worth holding. Cornell IPM gives February to May for the spring emergence. Cornell Cooperative Extension in Nassau County, writing for exactly this island, gives March through June and notes that the winged reproductives are drawn to light. Between them that is late winter to early summer, with the middle of spring doing most of the work.

For carpenter ants, Penn State Extension has winged males and females emerging from established colonies on warm days in spring and early summer, and University of Minnesota Extension puts swarmer activity at its peak from late winter through spring. University of New Hampshire Extension gives spring and summer, with nests inactive over the winter months.

Those two calendars sit directly on top of one another. There is no week in the Long Island spring when a winged insect at a window can be identified by the date on the calendar, which is why every reliable answer comes back to the waist, the antennae and the wings.

The rest of the year says other things. Cornell Cooperative Extension notes that termites favor heat from furnaces, chimneys and hot water pipes, particularly in winter, which is why the utility corner of a cellar earns a look in January when the outside of the foundation is telling you nothing. Carpenter ants run the other way: University of Minnesota Extension has workers foraging between sunset and midnight through spring and summer, and traveling up to a hundred yards from the nest. That distance explains why ants in a kitchen are so often nesting somewhere nobody in the house has thought about, and why a flashlight after dark finds trails a daytime inspection walks straight past.

One more calendar fact carries real weight. Cornell IPM notes that colonies require several years to produce new winged termites. A first swarm is therefore never the beginning of the story.

Where does each colony actually live, and why does that change the job?

They are organized in opposite directions, which is why the two pieces of work look nothing like each other.

The eastern subterranean termite is a soil animal. Cornell Cooperative Extension in Nassau County identifies Reticulitermes flavipes as the species here, describes four castes — dark brown to black winged kings and queens, plus white wingless workers and soldiers — and names the workers as the destructive wood-eating members, digesting cellulose with the help of gut protozoa producing cellulase. Cornell IPM sizes workers and soldiers at about a quarter inch, both white and wingless, the soldiers carrying enlarged yellowish heads and jaws. Everything above ground is an extension of a nest that is in the earth, which is why Cornell IPM’s account of the mud tube is really a description of a commute. University of Kentucky entomology notes that a colony may hold many thousands of individuals foraging in numerous directions, and Cornell Cooperative Extension is direct about the requirement underneath all of it: a reliable source of moisture.

The carpenter ant is a wood-cavity animal with a split household. University of Minnesota Extension describes parent nests outdoors in decaying wood and satellite nests indoors in insulation, hollow doors, sound wood and wall voids, with nesting concentrated around moisture from leaks, condensation or poor air circulation. Penn State Extension adds the threshold that turns the whole thing into a building diagnosis: carpenter ants will not infest wood that is sound and below fifteen per cent moisture content. The ant is not eating the timber, it is renting the cavity, and it rents where water has already done the demolition.

Hence two completely different jobs. A termite finding is a soil-and-perimeter problem belonging to a firm equipped for it. A carpenter ant finding is a moisture investigation with an insect attached, where the durable half of the work is a gutter, a flashing detail, a grade line or a replaced member — and that is the work this firm is built around.

What does Graduate do with each answer?

Two answers, stated plainly, so nobody has to infer them.

If it is a termite, we are not your firm. That is the end of the sentence: there is no version where we take a smaller piece of it or handle part of the job. Take the evidence with you when you call somebody who does this work — where the tube was and on which wall, whether it was live when you opened it, where the wings collected, when the swarm happened, and whether the swarmers came out of the yard or out of the building. A company given that on the first call arrives with the right expectation. And one point about inspections is worth knowing before you commission one: a large share of the framing that decides the answer sits behind finished cellar walls, under slabs and inside masonry joist pockets, so a report that does not state where the inspector could not see is not telling you what it appears to be telling you.

If it is a carpenter ant, that is our work, and the identification you have just done is the first half of the diagnosis. The ant control page sets out the method — locating the parent and satellite sites rather than treating the trail, baiting on live routes, and correcting the water that made the timber attractive to begin with. The carpenter ant profile is the deeper identification and behavior page, and it is where to go next if the wings you found were mismatched.

If it is neither, which happens often, the index at pest control covers what else turns up in framing across Long Island and New York City, and the pest library holds the individual profiles. Carpenter bees bore a clean round entry hole in unfinished trim and fascia and get blamed for structural damage far more often than they cause any. Plain decay accounts for a large share of the soft wood people bring us insects to explain.

What lowers the pressure on the building, whichever answer it turns out to be?

The same short list, because both insects are answering the same invitation.

Break the wood-to-soil contact. Cornell Cooperative Extension in Nassau County publishes specific clearances: a minimum of three inches between wood siding or baseboard and soil, eight inches of clean concrete between baseboard and soil, and one inch of free air space on all sides of wood girders entering foundation recesses. Those are numbers you can measure against, and they are routinely violated by things nobody thinks of as construction — a raised bed, a landscape tie, a deck post bearing on earth, a fence panel butted into siding.

Get the grade back down. Decades of mulch and topsoil raise the ground until it covers the top of the foundation and reaches the sill. It is created by gardening rather than by building, and on mature properties here it is the most common finding of its kind. The top of the foundation should be visible.

Move the water away. Cornell IPM’s prevention advice is structural rather than chemical: reduce moisture sources near the wood, place non-wood borders between wood and soil, and keep the soil dry near the foundation by encouraging ventilation and drainage away from the building. Cornell Cooperative Extension adds sealing foundation cracks with durable sealants, directing downspouts away from foundations, ventilating basements and crawlspaces, replacing wet or infested wood, removing wood debris and buried stumps, and using pressure-treated material where wood must sit in soil contact.

Clear the buried and stacked timber. Form boards left in the backfill, grade stakes, an old stump, a woodpile sitting on bare earth against the wall. Each is either a food source or a staging point and none of them is doing anything useful.

Close gaps with a material that belongs there. The most common failure in this trade is expanding foam, sprayed into an opening because it is fast and it disappears from view. It is not a barrier. It compresses, it is chewed through, and it conceals the very gap it was meant to close, which makes the next inspection worse rather than better. Graduate does not use it. Closing an opening properly means matching the material to the substrate and to the load, and that discipline is set out under structural exclusion.

None of this substitutes for treatment where there is an active termite colony, and the page is not suggesting otherwise. What it does is remove the conditions that made your particular wall convenient, which is worth doing on its own terms and is the part that outlasts anything applied.

Where should you go from here?

If you have wings on a sill, photograph them before you sweep, and if you can, lay a couple on white paper beside something for scale. If you have a tube on a foundation, note the wall and the height, break out a short length, and look again in a few days. If you have a drift of fibrous material below a joint, sweep it, date it, and watch whether it returns.

Then act on the answer. A termite finding goes to a termite firm. A carpenter ant finding — or an uncertain one where the evidence includes stringy spoil and clean galleries — goes to ant control. And if you would rather have somebody look at the specimen than decide from a photograph, that is a sound instinct and it is what we would prefer as well.

Graduate Pest Control has been reading buildings across Nassau, Suffolk, Manhattan, Brooklyn and Queens since 1983, and the founding view has not changed: the insect is a symptom and the building is the case. Arnold Katz, who started the firm and holds a B.S. in Entomology from the University of Georgia, still does the identification work on complex accounts. If you want a specimen read properly, get in touch and describe the building, its age, where the evidence was and what it looked like. The markets we cover are listed under locations, and the regional picture for Nassau and Suffolk sits on the Long Island page.