Red Imported Fire Ants

Solenopsis invicta

Color: Dark reddish-brown
Shape Segmented; oval
Size 1/16 – 1/4 inch long
Region Found in the Southeastern U.S., from Virginia to Texas, as well as California and New Mexico

Overview

Red imported fire ants (RIFA, for short) get their common name from their ability to inflict painful bites and stings. Originally from Brazil, RIFAs were introduced to the U.S. in 1933 and are now found throughout the southern part of the country.

Habits

RIFA usually nest in soil near structural foundations or in landscaping. They build large mound nests that are flattened and irregular in shape, and between two and four square feet in size. Although these ants usually nest outdoors, they can gain access to buildings through HVAC systems and AC units, and will nest in areas of exposed soil within buildings, such as bath traps. RIFAs are commonly introduced into new areas through potted plants, shrubs, and trees.

Threats

Fire ants will sting humans who disturb a nest. The sting of a RIFA is painful and often results in a raised welt that becomes a white pustule. Often, a person stung by a RIFA receives multiple painful stings from more than one of the ants. Those with allergies to insect stings will react more severely.

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