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Utah State University Extension

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Imported fire ants (Order Hymenoptera, Family Formicidae) (IFA) are social insects representing two South American ant species: the red imported fire ant (Solenopsis invicta Buren) and black imported fire ant (Solenopsis richteri Forel), along with their hybrid offspring. IFA are native to South America, where their colonies are kept in check by native competitors, predators, and parasites. However, they have invaded other countries, including Australia, New Zealand, and the U.S., causing agricultural, ecological, economical, nuisance, and public health problems, which are described in more detail in this fact sheet. Management is also addressed.

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