How to Identify and Report Suspected Fire Ants in Australia

If you spot a suspicious ant nest in Australia, keep people and pets away, photograph it only from a safe position, and report it promptly. You do not need to identify the species with certainty before contacting biosecurity authorities. In Queensland, the National Fire Ant Eradication Program accepts reports on 13 22 68 (132 ANT) or online. In New South Wales, call 1800 680 244 or use the NSW Government's fire ant reporting service. Other states and territories have their own channels, listed below.

The species of greatest concern is the red imported fire ant (Solenopsis invicta), an invasive ant capable of swarming and delivering repeated painful stings. This guide explains what you can reasonably identify from a distance, when to report, what evidence helps, and which common actions can make a suspected infestation harder to contain. The advice is based on Australian government and eradication-program guidance checked on October 30, 2026.

How can you tell whether an ant might be a fire ant?

Look for a combination of signs rather than relying on color alone. Workers of red imported fire ants are approximately 2–6 millimeters long, often copper-brown with a darker abdomen. A colony contains workers of visibly different sizes. The National Fire Ant Eradication Program's official identification guide provides photographs and comparisons with Australian ants that may look similar.

• Body: small, copper-brown ants with a darker rear segment; individuals within the same colony are not all the same length.
• Behavior: fire ants aggressively defend their nest and may swarm and sting repeatedly if disturbed. Do not deliberately test this characteristic.
• Setting: sightings are possible in gardens, lawns, playgrounds, parks, paddocks, roadsides and newly disturbed soil, as well as around landscaping materials.

These traits are warning signs, not proof. Other local ants can also be brown, bite, sting or build soil nests. For example, meat ants can be reddish or purplish but tend to be larger, while coastal brown ants can have conspicuously large-headed workers. If identification remains uncertain, make a report rather than handling the ants to compare them.

What does a suspected fire ant nest look like?

A mature nest may resemble a dome-shaped mound of loose soil without an obvious entrance or exit hole. However, young nests and nests in certain soil conditions may look like flat or barely raised patches of disturbed dirt. The absence of a large mound does not rule out fire ants. See the Agriculture Victoria identification guidance for descriptions of both new and established nests.

Check visually while keeping your distance from sunny, open spaces and edges of garden beds, paths and driveways. Nests can also occur around utility pits or beneath objects such as pavers, timber and rocks. Avoid lifting these objects or breaking into the mound to see whether ants emerge. A photograph of an undisturbed nest, even without a close-up of individual ants, can still support a report.

What should you do immediately after finding a suspicious nest?

1. Leave it undisturbed. Do not kick, dig, spray, flood or try to capture the ants. Move children and pets away and avoid standing near the mound.
2. Record the location. Note the street address, nearby landmark or phone map location, along with the date you noticed the activity.
3. Take photos only if safe. A wider image showing the location and a closer image from a safe distance may be helpful. Do not risk a sting to obtain a better image; reporting without one is acceptable.
4. Report promptly. Use the appropriate state or territory service. The national eradication program recommends reporting suspected sightings within 24 hours.
5. Keep potentially affected materials in place. Avoid moving soil, turf, pot plants, mulch or equipment from the suspected area while you seek official instructions.

The NSW Government's October 2026 advice sums up the priorities as leaving a suspected nest alone, safely taking a picture, and calling the authorities. Although some educational materials discuss observing ants after prodding a nest with a long stick, deliberately disturbing a suspected colony is unnecessary to make a report and can expose people and animals to stings.

Where do you report fire ants in Australia?

Use a jurisdiction-specific reporting channel where available. If you are uncertain which authority applies, the Australian Government's Exotic Plant Pest Hotline, 1800 084 881, directs callers to the relevant state or territory biosecurity authority. Do not use emergency medical services for a routine insect sighting.

For unusual ants found in imported freight, shipping containers or goods under border biosecurity control, follow the applicable containment rules and the Australian Government's SEE. SECURE. REPORT. guidance, which gives 1800 798 636 for relevant border biosecurity detections.

What information should you include in a report?

The most useful report tells officers where the ants are and what you observed, not just that you saw a red ant. Prepare the following details if available:

• Exact address, GPS location, property access instructions or nearby landmark.
• Photos or video taken from a safe position, showing ants, the soil mound and its surroundings.
• Approximate ant size and color, whether workers vary in size, and nest appearance.
• Date and time first noticed, including any recent delivery of turf, soil, plants or other materials.
• Whether anyone or any animal has been stung, and your contact details for follow-up.

If you cannot safely get photographs or do not know the answers, report anyway. The National Fire Ant Eradication Program specifically accepts reports without images and may ask clarifying questions by phone. Queensland reports can be followed through the program's tracking service using the ANT reference number provided after submission.

Should you treat the nest yourself or move nearby materials?

Do not automatically treat a newly suspected nest. In most locations, report first and await instructions. Self-treatment is recommended only in certain designated areas of South East Queensland; the program says it is not recommended outside those areas. Check the official self-treatment eligibility guidance before taking action.

Moving garden soil, turf, pot plants, mulch and machinery can inadvertently transport ants. Rules differ by zone, material and jurisdiction. If you handle these items commercially—or are planning a landscaping delivery—check the current fire ant detection map and applicable movement-control information before moving anything potentially affected. The map shows confirmed detections, not every unverified sighting; a blank-looking area is not proof that no ants are present.

What if someone or a pet has been stung?

Move away from the ants immediately. For localized stings, the program recommends washing the skin with soap and water, applying a cold pack, considering suitable pain relief or an antihistamine, and monitoring symptoms. Do not pop blisters. If you are unsure about treatment or symptoms are worsening, seek medical advice. See the program's sting first-aid guidance.

Call triple zero (000) immediately for possible anaphylaxis, including trouble breathing, swelling of the tongue or throat, collapse or sudden severe systemic symptoms. If an adrenaline autoinjector is available and indicated, use it immediately and follow the person's allergy action plan. Australia's healthdirect advice on ant stings gives further emergency signs. For an affected pet, move it away safely and contact a veterinarian if it develops breathing difficulties, vomiting, marked lethargy or other concerning symptoms.

Are fire ants spreading across Australia?

Fire ants are an established biosecurity issue in South East Queensland, while individual detections elsewhere require separate investigation and response. For example, the Australian Department of Agriculture confirmed ants found at a Strathfield, Sydney facility in September 2026, and NSW subsequently introduced targeted biosecurity controls and monitoring in response. A detection in a new place does not, by itself, prove that a widespread local infestation is established. Read the Australian Government's October 13 account and the current NSW response page for the scope of the confirmed findings.

The practical rule is the same whether you live near a known detection or far from one: do not wait for a perfect identification. Keep a safe distance, record the location and report a credible suspicion to the relevant authority. Early reports give specialists the opportunity to identify the ants and decide whether surveillance, containment or treatment is needed.