Biosecurity alert: Red imported fire ant

Page last updated: Wednesday, 13 May 2020 - 3:40pm

The Department of Primary Industries and Regional Development detected Red imported fire ant (Solenopsis invicta) at two adjoining tenanted properties at Fremantle Ports in November 2019.

Western Australia is free from Red imported fire ant (RIFA). If it became established in WA, it could severely damage the local environment, economy and Australia's outdoor lifestyle. RIFA inflict a painful, fiery sting, which in rare cases can cause an acute allergic reaction.

Treatment and surveillance activities are underway, and a Quarantine Area has been established. 


Register here if you have received a letter about surveillance on your property or would like updates on our Red imported fire ant (RIFA) eradication program.

REMEMBER: Quarantine Area restrictions remain in place.

Round two surveillance 15 April - 29 May 2020

Our eradication program continues and we are about to conduct the next round of surveillance and baiting in and around Fremantle. Close to 600 properties have been randomly selected to receive an inspection, at no cost to owners/occupiers, as part of our ongoing surveillance program. 

We would like to arrange a suitable time to access your garden and outdoor areas. To arrange an inspection:

If you are unavailable between 15 April and 29 May, please contact us to arrange another date.

COVID-19 precautions

Because of the threat of red imported fire ants establishing in Western Australia, the response program has been deemed an essential service during the COVID-19 pandemic. However, we are aware of the potential risks of COVID-19 and have in place a number of specific procedures to ensure your safety and the safety of our inspectors.

We only require access to your garden and outdoor areas and will not enter your home or other buildings on your property. We assure you we will strictly adhere to the department’s COVID-19 guidelines when visiting your property. These guidelines include contactless visits, social distancing and hygiene protocols. Alternatively, feel free to discuss when you book your inspection.

Your cooperation is really important and greatly appreciated.

Learn more about the vital surveillance work our officers are undertaking in the Fremantle community.

Reporting options

Report your observations using the MyPestGuide Reporter app or online at

Report any unfamiliar ants immediately – even if unsure. Do not touch ants or disturb the nest as they may aggressively defend it. Do not send in live samples. Take a photo if safe to do so.

Contact the department via: