Invasive red fire ants have been found in a Sydney container yard, sparking fears the super pests may have spread further.
The pests, which are already in parts of southeast Queensland, were discovered in a shipyard at the Enfield Intermodal Logistics Center in Strathfield, hidden deep under a layer of concrete near a shipping container.
The NSW government has deployed a team to spend the next two weeks tracking down any more nests, and the public is urged to co-operate with authorities.
What are fire ants?
Red imported fire ants are one of the world’s worst invasive species.
They are dark reddish-brown and have a brown-black abdomen.
Nests can appear as patches to mounds of soil up to 40cm high, with no visible entry hole.
Fire ants are aggressive and swarm in large numbers, with a burning sting that can lead to anaphylactic allergic reactions.
Why are they a problem?
Fire ants have no natural predators in Australia and can severely impact the environment, economy, agricultural industries, people’s health and pets.
If bitten you will feel like your body is on fire, with some people experiencing an allergic reaction or anaphylaxis.
Fire ants feed on insects, spiders, lizards, frogs, birds and mammals.
It is estimated fire ants can reduce biodiversity in up to 45 per cent of birds, 38 per cent of mammals, 69 per cent of reptiles and 95 per cent of frogs, according to the federal government.
Crops can also be affected by fire ants, increasing the cost of production and supply.
The NSW government also warns that fire ant nests can damage equipment, such as irrigation systems and machinery, and livestock can be stung or starve if prevented from reaching their food.
Fire ants can also cause damage to sensitive electrical equipment like meter boxes, traffic lights and air conditioners by chewing through the insulation.
University of Sydney Professor Dieter Hochuli said finding one nest was concerning.
“Fast action can make the difference between quick eradication and decades of expensive management,” he said.
“They have been found in Sydney before and, while this needs to be taken seriously, there’s no reason to panic. They’ve been successfully eradicated before.
“It’s interesting the genetics suggest this isn’t a spread of the Queensland infestation, but these ants have arrived under their own steam.”
What to do if you suspect you have fire ants on your property
You should take photos or a video of the suspected ants as closely as you can without disturbing their nest.
Then make a report by using the online form or call 1800 680 244.
NSW DPIRD will then work with the National Fire Ants Eradication Program to search surrounding areas, treat the ants and stop their spread at no cost to the owner.
What to do if you are bitten by a fire ant
Fire ants cause a burning sting that is extremely painful and you could be stung hundreds of times within seconds if a nest is disturbed.
Each ant can deliver many stings, making you feel like your body is on fire, which can last up to an hour.
Small white pustules then form within 48 hours, which can become itchy and infected.
The NSW government warns that if you are bitten by a fire ant you must seek medical attention if you are prone to allergic reactions or experience symptoms of anaphylaxis.
You should apply a cold compress or ice to the stings to relieve the swelling and pain.
If blisters form on your skin, you should leave them intact, washing gently with soap and water.