Argentine Ants

About Argentine Ants

Argentine ants are one of the most common invasive ant species in Orange County. These small, light-to-dark brown ants form massive supercolonies that can stretch across entire neighborhoods. Unlike many ant species, Argentine ant colonies have multiple queens, making them extremely difficult to eliminate without professional help. They are attracted to sweet foods and moisture, frequently invading kitchens, bathrooms, and pet feeding areas. Their sheer numbers and persistent trailing behavior make them a year-round nuisance for Southern California homeowners and businesses alike.

How to Identify Argentine Ants

• Light to dark brown color, about 1/16 to 1/4 inch long
• Travel in wide, well-defined trails along edges and foundations
• Emit a musty odor when crushed, unlike other ant species
• Lack a stinger but may bite when disturbed
• Colonies contain multiple queens, often with millions of workers

Lifecycle

Argentine ant queens lay eggs continuously, producing dozens per day. Eggs hatch in about 28 days, and the entire development from egg to adult takes roughly 74 days. Colonies can persist for years because multiple queens ensure constant reproduction, making population control extremely challenging without sustained treatment.

Health & Property Risks

• Contaminate food supplies by trailing through kitchens and pantries
• Displace native ant species, disrupting local ecosystems
• Attract other pests such as aphids by farming them for honeydew
• Can cause short circuits by nesting inside electrical equipment