The Southern Fire Ant (Solenopsis xyloni) is reddish-brown to yellowish-red and typically measures ⅛–¼ inch (polymorphic). The southern fire ant (Solenopsis xyloni) is the native fire ant species of the American Southwest, including Arizona. It closely resembles the imported red fire ant but tends to build looser, more ir.

Yes — the Southern Fire Ant is considered a high-risk pest. Painful multiple stings; venom causes burning pain and white pustules. Risk of allergic reaction. Nesting in wall voids or under slabs can make elimination difficult.

In Arizona, southern fire ants are most often encountered in the following situations: Loose, irregular mounds — often under rocks, boards, or debris. Reddish-brown ants that swarm aggressively when disturbed. Sting pustules on skin after contact.

The Southern Fire Ant is most active during: Year-round; most active spring through fall. 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.

Remove debris, boards, and rocks from yard. Treat mounds promptly. Seal entry points around the foundation. Reduce moisture sources that attract foraging ants.

Granular bait and contact insecticide treatments. Void treatments may be needed for ants nesting inside walls or under slabs.

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