The Argentine Ant (Linepithema humile) is light brown to tan and typically measures ⅛ inch. The Argentine ant (Linepithema humile) is one of the world's most successful invasive species. Native to South America, it has spread to every continent except Antarctica and is well-established in ur.

The Argentine Ant is generally low-risk, but caution is still advised. No sting; not medically dangerous. Primary concern is large-scale home invasion, food contamination, and displacement of native ant species. Extremely difficult to eliminate due to supercolony structure.

In Arizona, argentine ants are most often encountered in the following situations: Dense trails of small, uniform light-brown ants — often along walls, countertops, or plumbing. Massive numbers appearing suddenly during heat or rain. No visible mound; nests in soil, under slabs, or in wall voids.

The Argentine Ant is most active during: Year-round; invasions peak during summer heat and monsoon season. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Seal all entry points around doors, windows, and pipes. Eliminate moisture sources. Store food in sealed containers. Trim vegetation touching the structure. Treat perimeter regularly.

Slow-acting liquid or granular bait placed along active trails — workers carry it back to multiple queens. Perimeter spray treatments. Repeat service required due to supercolony reinfiltration.

Most store-bought ant sprays kill only the workers you see, while the queen and colony remain protected underground. Effective Argentine Ant control requires baiting or targeted colony treatments that workers carry back to the nest. Pest Control Bros uses professional-grade products and application methods that address the entire colony.