Fire ants are small, but their sting packs a serious punch, and their colonies can grow fast once they settle in. The U.S. is home to several fire ant species, including a few native varieties, but the red imported fire ant (Solenopsis invicta) is the most widespread and aggressive, which is why it's the main focus of attention.
The term "fire ant" covers several species found in the U.S., including a few native ones, but the red imported fire ant (RIFA) causes the vast majority of problems for homeowners and businesses.
They are small, reddish-brown insects that live in large, highly organized colonies. Despite measuring only about one-eighth to one-fourth inch, they're known for their aggressive defense of the nest and a sting that can cause intense burning, itching, and swelling.
Because they build extensive underground tunnel systems, a single visible mound is often just a small part of a much larger colony.
Call now to book your free inspection.
Fire ants thrive in warm climates and are drawn to open, sunny spaces where they can build extensive mound systems.
Fire ants prefer warm, sunny areas such as lawns, gardens, fields, and sidewalk cracks, with the southern United States, including Texas, Florida, and Georgia, offering ideal conditions. Their mounds have no central opening and can grow quite large, housing the queen, workers, and larvae in a network of tunnels below.
Indoors, fire ants are less common but may enter during extreme weather in search of shelter; this usually points to a nest nearby.
Fire ants are aggressive foragers and will eat a wide range of foods, including plants, other insects, and even small animals. This flexible diet allows colonies to establish quickly and survive in many different environments. This is partly why they’re such a persistent pest.
Red imported fire ants go through four life stages, the same as other ants:
At the colony level, a single queen can lay hundreds to as many as a few thousand eggs a day and may live for several years, while worker ants typically live only one to six months. New queens mate during nuptial flights, then shed their wings and start new colonies underground, often reaching maturity within 6–12 months.
Fire ants' behavior sets them apart from many other ant species. When a nest is disturbed, workers swarm out and sting repeatedly to defend their colony. Some fire ant populations form “supercolonies” with multiple queens and large numbers of workers. They can also spread by budding, establishing new nests nearby.
Fire ants bite to grip the skin, then sting repeatedly, injecting venom that causes a burning sensation and can leave raised, itchy welts or white pustules behind. Most people recover from a sting within a few days, but some experience a stronger reaction.
Beyond the sting, they're also known to nest inside electrical equipment, drawn to the currents from air conditioning units and circuit boxes, which can lead to costly repairs if left unaddressed.
For lasting results, professional fire ant control is generally the most effective route. We’ll help to identify the species and use targeted bait and treatment methods designed to address the colony at its source, rather than just the ants visible above ground. A free inspection can help confirm how far the activity has spread and the right plan for your property.
Fire ants defend their colony as a group, so when a nest is disturbed, workers swarm out together and sting repeatedly to protect the queen and larvae inside. This coordinated response is what makes an encounter with fire ants feel so intense.
Fire ants are known for their stings rather than bites. Unlike some ants that may only bite, fire ants use their mandibles to latch onto their target before delivering a sting, injecting venom that can cause intense pain and itching.
Fire ants’ invasive nature, resilience, and aggressive behavior make them stand out. Their ability to form large colonies with multiple queens and rapidly spread makes them one of the most persistent pests in the U.S.
Additionally, their sting poses a physical threat to humans and animals, and they have been observed to negatively impact native ecosystems.
Between 100,000 and 250,000 workers tend to form a fire ant colony, along with multiple queens. The colony’s population size allows it to rapidly gather resources and defend against threats, making it difficult to control.
Fire ant stings can cause severe pain, followed by burning and itching. Many people develop pustules at the site of the sting, which can become infected if scratched. Those with allergies to insect stings may experience more severe symptoms, such as swelling, dizziness, or anaphylaxis, requiring immediate medical attention.
Fire ants can be identified by their reddish-brown color, aggressive behavior, and distinctive mound-like nests. If disturbed, fire ants will swarm quickly, unlike many other ants that may simply scatter. The reddish color and rapid response are often clear indicators of a fire ant colony.
Fire ants are common in the southeastern United States, including Texas, Florida, and Georgia. They thrive in warm, sunny climates, and their range is gradually expanding. Red imported fire ants have been spotted as far north as Maryland, indicating their adaptability and ability to spread.
Fire ants often enter new areas in search of food or in response to environmental factors like flooding. During extreme weather events, they may seek higher ground and move closer to homes, which explains sudden appearances in certain seasons or after rainfall.
While carpenter ants and fire ants can both cause problems, they differ significantly. Carpenter ants are generally black and tunnel into wood to create their nests, whereas fire ants create large mounds in open, sunny areas. Additionally, carpenter ants don’t sting, whereas fire ants do.
Call our local experts now {telNumber} ({openingHoursSummary}) or view more details about your nearest branch