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Imported Fire Ants: What Are Fire Ants

Last Updated: December 12, 2011

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Red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae). Photo by University of Florida. Click to link to an enlarged image.

Imported fire ants are ant species in the genus Solenopsis that can cause serious medical, economic and ecologic problems. They are called imported fire ants because they are native to South America.

The two species of imported fire ants (red imported fire ant, Solenopsis invicta Buren, and black imported fire ant, Solenopsis richteri Forel) and their hybrid are  invasive insects.  Their stings can cause serious medical problems.

Imported fire ants interfere with outdoor activities and harm wildlife throughout the southern United States and elsewhere. Ant mounds are unsightly and may reduce land values.

Although fire ants do prey on flea larvae, chinch bugs, cockroach eggs, ticks, and other pests, the problems they cause usually outweigh any benefits in urban areas.

While it may not be possible to eradicate fire ants, controlling them is highly desirable. The best control programs use a combination of non-chemical and chemical methods that are effective, economical, and least harmful to the environment.

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