The Fire Ants (Solenopsis invicta) is reddish-brown with darker abdomen and typically measures 1/8–1/4 inch (workers vary in size). Red imported fire ants (Solenopsis invicta) are an invasive species that have spread throughout the southern United States, including Arizona. They build large, dome-shaped mounds in open, sunny areas.

The Fire Ants poses a moderate risk. Multiple simultaneous stings can cause severe allergic reactions (anaphylaxis) in sensitive individuals, which can be life-threatening. Fire ants also damage electrical equipment, invade homes, and can kill young livestock and wildlife.

In Arizona, fire antss are most often encountered in the following situations: Dome-shaped mounds of loose soil in sunny areas of the yard, often with no visible entry hole on top. Aggressive swarming behavior when the mound is disturbed. Painful stings followed by white pustules 24–48 hours later.

The Fire Ants is most active during: Year-round; most active spring and fall when temperatures are moderate. 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.

Treat mounds promptly before they grow. Maintain a well-treated perimeter around your property. Inspect the yard regularly, especially after rain when new mounds appear. Avoid disturbing mounds without protective footwear.

Individual mound treatments with contact insecticides or baits, combined with broadcast bait applications for large infestations. Professional treatment is recommended for yards with multiple mounds.

Most store-bought ant sprays kill only the workers you see, while the queen and colony remain protected underground. Effective Fire Ants 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.