Yellow Crazy Ants Infestation Requires Multi-Agency Response

Over 30 field staff from Wet Tropics Management Authority, Queensland Parks and Wildlife Service, Biosecurity QLD, Marine Parks and Whitsunday Regional Council have completed a 3-day detailed Yellow Crazy Ant survey from 2 – 5 September at infestation areas within Conway National Park.

The aim of the detailed survey is to accurately map the infestation areas in Shute Harbour so a revised and cost-effective baiting Program can be implemented.

During recent years Council has noticed that the infestation and the number of Yellow Crazy Ants have declined due to the baiting Program.

Whitsunday Regional Council Natural Resources Manager Scott Hardy said,
“Multi-agency activities such as this don’t happen often, but it’s representative of how important it is to manage this highly invasive pest that has the potential to have significant impacts on biodiversity, tourism, agriculture and our lifestyle if left unchecked.”

“In large numbers, they can disrupt entire ecosystems with their veracious appetites and ability to create 'super colonies' across large areas, leaving heavily infested areas without animals, insects or native ants,” Mr Hardy said.

The Whitsunday Yellow Crazy Ant Treatment program has cost over $375,000 since 2019, with baiting completed at Shute Harbour, Mandalay, Funnel Bay and Woodwark.

Mr Hardy said, “Initial results from the survey indicate that our baiting program was very successful with only a few ants found in a small area of Shute Harbour, however, given small nests can quickly expand into super colonies, it’s important we stay vigilant and do our best to eradicate.”

Eradication cannot be confirmed until up to 5 years of detailed surveys confirm no Yellow Crazy Ants in the area, which is a testament to how a few ants evading detection can quickly multiply.

Mayor Ry Collins said, “Whilst we are experiencing success managing existing outbreaks, we want the construction industry and community to remain vigilant around new builds and existing infected areas to identify Yellow Crazy Ants and contact Council immediately if suspected.”

“We thank the many staff from all agencies that have helped us on the journey to date and hope to continue to receive funding support to manage this pest into the future, protecting our lifestyle, biodiversity and industries,” Mayor Collins said.

Further information on Yellow Crazy Ants can be found on Whitsunday Regional Council website. Baiting is not considered hazardous to people and animals.

How to spot a Yellow Crazy Ant:
   • Yellow to brownish ant with body about 5mm long.
   • Abdomen is dark brown, sometimes striped.
   • Legs and antennae are very long.
   • Body is long and slender.
   • Walking style is erratic.

Impacts:
   • Sprays formic acid, which may cause burning and irritate skin and eyes of animals and potentially humans.
   • Destroys or disrupts natural species, including native birds, animals and plants.
   • Can affect horticulture industries.

The Yellow Crazy Ant is a category 3 restricted tramp ant under the Biosecurity Act 2014. If you see any report the incident to the local Council.

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Over 30 field staff from a variety organisations completed a 3-day detailed Yellow Crazy Ant survey. Photos supplied

Yellow Crazy Ants can be very destructive to local wildlife

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