Killing the ants you see is the one thing that doesn't work.
A trail on the counter is the smallest visible part of a colony that may number in the thousands. Contact sprays kill foragers and leave the queen producing replacements, which is why the trail returns in a week. We identify the species, find where the colony is actually living, and use baits the workers carry back — because the goal is the nest, not the trail.
The ants we actually see on the North Shore
Species identification changes the treatment completely. These account for most residential calls in our service area.
- Pavement antsSmall, dark brown to black, the most common indoor ant here. They nest under slabs, driveways, patios, and along foundation expansion joints, then forage indoors through slab cracks and utility penetrations. Persistent, and almost never solved from inside.
- Odorous house antsCrush one and it smells faintly of blue cheese or coconut. Highly adaptable, with colonies that split and relocate under stress — which is exactly what repellent sprays cause. Treating these wrong makes the problem worse and larger.
- Acrobat antsThey raise the abdomen over the thorax when disturbed. Often nesting in wood previously damaged by moisture or carpenter ants, and frequently found running along utility lines and siding gaps. Their presence sometimes points to a moisture problem worth finding.
- Pharaoh antsTiny and pale yellow, usually in kitchens and bathrooms. These are the one species where spraying is genuinely counterproductive: it triggers budding, where the colony fragments into multiple new colonies. Bait-only, always.
- Citronella antsYellowish, with a lemon scent when crushed. Usually a nuisance rather than a problem — they swarm from soil near foundations and get mistaken for termites. Correct identification here saves homeowners an unnecessary termite treatment.
- Carpenter antsLarge, black, and structurally destructive. These are a different problem with a different approach, covered in detail on our carpenter ant page.
How we handle an ant account
- Identify the speciesUnder magnification if needed. Pavement, odorous house, and pharaoh ants each demand a different product strategy, and getting this wrong is why most ant treatments fail.
- Trace the trail to its sourceForaging trails follow edges — baseboards, countertop seams, sill plates, utility lines. We follow them backward to the entry point and, where possible, the nest.
- Bait, don't blanketWorkers carry bait to the colony and feed the queen and brood. That's what actually collapses a colony. Repellent sprays over an active trail break the chain and can split the colony instead.
- Correct the conditionsOverhanging branches, mulch banked against siding, firewood on the ground, leaking hose bibs, and unsealed slab cracks. Ants are following moisture and food; removing those makes any treatment last longer.
- Exterior perimeter and follow-upA targeted exterior application at the foundation and known entry points, then a return visit to confirm the colony is down rather than relocated.
Why the ants came back two weeks later
Almost every homeowner who calls us about ants has already tried a store-bought spray. It works, briefly, and that's the trap: killing visible foragers removes maybe two percent of the colony while leaving the queen entirely untouched. Worse, most consumer sprays are repellent, so surviving workers avoid the treated area and simply route around it. With odorous house ants and pharaoh ants, that stress response can cause the colony to bud into several smaller colonies. You end up with more ants in more places than you started with.
Ants in the kitchen aren't a sanitation verdict
People are frequently embarrassed to call about ants, as though it says something about how they keep house. It doesn't. Pavement ants nest under slabs and come in through expansion joints regardless of how clean the kitchen is. Spring and early summer bring them indoors as colonies expand and outdoor food gets competitive. A spotless home on a slab foundation in Commack is as likely to see them as any other.
When ants indicate something bigger
Some ant activity is a symptom rather than the problem. Acrobat ants nesting in wall voids often occupy wood already softened by a roof or plumbing leak. Carpenter ants almost always mean sustained moisture somewhere. When we find those species we look for the water source, because treating the ants without fixing the leak means treating them again next year.
Where we provide this service
Northport, East Northport, Huntington, Halesite, Centerport, Greenlawn, Cold Spring Harbor, Fort Salonga, and the surrounding North Shore communities. See all service areas.
Not sure what you're dealing with?
Send a photo by text and we'll tell you what it is. Identification is free, and it's the step that determines everything else.