Why are pharaoh ants harder to control than other house ants?

Pharaoh ants are tiny — about 1/16 inch long — with a pale yellow to light brown, almost translucent body. Their small size lets them fit through the tiniest gaps, and they’re notorious for nesting in inaccessible areas like wall voids, behind baseboards, and inside electrical outlets.

Pharaoh ants are especially problematic in hospitals and multi-unit housing because they reproduce quickly and split into new colonies (a process called “budding”) when disturbed. Using repellent sprays on pharaoh ants often backfires, causing the colony to fragment into several new colonies rather than being eliminated.

Quick comparison: the 5 most common house ants

Take the right next step for your ant problem

Identifying which of these five species has moved into your home is the first real step toward getting rid of them for good. Odorous house ants and Argentine ants usually respond well to sweet bait, while pavement ants and carpenter ants often need a protein-based bait to target the colony directly. Pharaoh ants require extra caution, since disturbing their nest can multiply your problem instead of solving it.

If you’re still unsure which species you’re facing, take a clear photo and compare it against the identifiers above, or reach out to a licensed pest control professional for confirmation. Correct identification now saves you time, money, and repeat treatments later.

Frequently asked questions about house ants

Are house ants dangerous to humans?
Most house ants, including odorous house ants, pavement ants, and Argentine ants, don’t bite or sting and pose no direct health risk. Carpenter ants can bite if handled, though it’s rarely serious. Pharaoh ants are a concern in healthcare settings because they can spread bacteria as they travel through unsanitary areas.

How much does professional ant treatment typically cost?
Costs vary widely based on infestation size, species, and location, generally ranging from $100 to $500 for a standard treatment. Carpenter ant infestations tied to structural damage can cost more due to the need for wood repair alongside pest control.

Can I get rid of house ants without calling an exterminator?
Yes, for smaller infestations. Sealing entry points, removing food sources, and using species-appropriate bait often resolves minor problems within one to two weeks. Larger colonies, especially carpenter ants or pharaoh ants, typically need professional treatment.

How long does it take to eliminate a house ant colony?
Bait-based treatments usually take one to two weeks to fully eliminate a colony, since ants need time to carry bait back to the nest and share it with the queen. Spraying visible ants for immediate results often disrupts this process and prolongs the infestation.

What attracts ants into a house in the first place?
Ants enter homes searching for food, water, and shelter. Common attractants include exposed food crumbs, pet food left out overnight, standing water, and structural gaps around windows, doors, and utility lines.