In late March 2024 a biosecurity team operating within the federal agriculture department detected a nest of red imported fire ants at the Enfield Intermodal Centre in Sydney’s inner west. The insects, measuring only 2–6 millimetres in length, are classified as a highly invasive species. The nest was found hidden under concrete near a shipping container at the facility, which lies in the suburb of Strathfield. Authorities immediately treated the nest and destroyed it, but the discovery set off a wider investigation because the ants are known to spread quickly if left unchecked.
Genetic analysis confirmed that the specimens were red imported fire ants. Experts said the genetic profile indicated the ants most likely arrived in Australia inside an overseas shipping container. This pathway mirrors previous incursions, such as the detection at Port Botany in 2014, which was subsequently eradicated. The NSW Government has stressed that the current find is not believed to be linked to the ongoing fire ant infestation in south‑east Queensland.
Following the confirmation, the NSW Government deployed an Incident Management Team to comb the local area for any further signs of the ants. The team was given a two‑week timeframe to inspect properties and surveillance zones. Initial inspections focused on a 500‑metre radius around the Enfield site, while surveillance and treatment efforts were expanded to a 2‑kilometre radius. Officials from the Department of Agriculture, Fisheries and Forestry worked alongside local businesses to coordinate the search and to encourage community cooperation.
These figures were used to justify the expanded search radius and to underline the urgency of the operation.
To gauge the risk of dispersal, scientists ran models based on the nest’s location. Scott Charlton, an expert cited in the briefing, explained that modelling showed a 93 percent probability that the ants had already spread to within 500 metres of the detection point. For the broader 2‑kilometre area, the model indicated an additional 23 percent chance that the ants could have reached that distance. These figures were used to justify the expanded search radius and to underline the urgency of the operation.
Agriculture Minister Tara Moriarty appeared repeatedly in public statements to stress the importance of swift action. She said, "making sure any potential spread is identified and eradicated quickly," and later added, "While fire ants are one of the world’s most invasive species, they can and have been successfully eradicated in New South Wales." She also noted that, at the time of her remarks, no further ants had been found, but the focus remained on confirming that status.
Reece Pianta, representing the Invasive Species Council, used the incident to highlight broader biosecurity needs. He warned that in south‑east Queensland fire ants invade backyards, parks and sporting fields, attack pets and wildlife and threaten agriculture and infrastructure, adding that Sydney does not want to find out what living with fire ants looks like. Pianta also said the detection is a reminder of why investment in strong border biosecurity and surveillance is essential, and that finding new incursions quickly is critical to stopping the ants from becoming established.
Officials pointed to the 2014 Port Botany incident as proof that eradication is possible when acted upon quickly. At that time, fire ants were detected and subsequently eradicated, a outcome that Moriarty cited as evidence that NSW has the capacity to repeat the success. The Invasive Species Council has used the current episode to advocate for increased national biosecurity funding, arguing that robust border checks are the first line of defence against such pests.
Reece Pianta referenced the potential financial impact should the ants become established across Australia. He noted that the Invasive Species Council warned the spread of the 'super pest' could cost the Australian economy up to $2 billion a year. This figure underscores why early detection and eradication are considered economically prudent.
The Incident Management Team has been deployed to conduct a two‑week sweep of the designated zones to search for any further signs of the ants. Surveillance continues within the originally defined 500‑metre property‑inspection radius and the extended 2‑kilometre search area. Authorities remain vigilant, ready to act should any further signs emerge, while reiterating the importance of maintaining strong biosecurity measures at points of entry to prevent future arrivals.