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Tropical fire ant

Tropical fire ants (Solenopsis geminata) are an extremely aggressive invasive pest and can have major horticultural and environmental impacts. 

Shiny brown-orange ants
Brown-orange ants on food
Tropical fire ants on food

Tropical fire ant

Tropical fire ants can form super-colonies, displacing native ants, insects and animals and feed on any plant or animal matter from seeds to small mammals and birds. 

They are highly aggressive ants with a painful sting and disturbing a nest can quickly result in dozens of stings. 

What to look for 

  • Shiny brown-orange body with a range of sizes (2 to 8 mm). 
  • Some ‘major’ (larger) ants have an oversized square head.  
  • Forming large colonies, often presenting as sandy mounds. 

Where to look 

  • Nests in sand, lawns, parklands and disturbed areas, mostly in sunny places.
  • In plant materials or soil from gardens, nurseries or agricultural land.
  • High risk ants for Cocos (Keeling) and Christmas Islands
    pdf (653 KB)
  • High risk ants for Western Australia
    pdf (1.06 MB)

Early detection and reporting will help protect WA's primary industries.

If you find or suspect the presence of tropical fire ant, report it in one of the following ways:

  • MyPestGuide Reporter app

    Download the app so you can report pests on your smartphone.

  • MyPestGuide website

    Explore the range of apps that help you identify, report and manage pests. 

  • Call PaDIS

    The department's Pest and Disease Information Service can help with identification and advice. 

    Phone: (08) 9368 3080

    Email: padis@dpird.wa.gov.au

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