A14 · Ant
Coastal Brown Ant
Pheidole megacephala
Two-sized ants that nest under pavers and kick up sand. A major nuisance in Queensland and northern NSW gardens.
- Size
- 1.5–2 mm (minor), 3.5–4.5 mm (major/soldier)
- Habitat
- Gardens, pavers, wall cavities, skirting boards
- Activity
- Warm months, day and night
Overview
Coastal brown ants have two distinct worker sizes — tiny minors and much larger majors with big heads. They excavate sand from under pavers, making them uneven, and forage indoors for grease and proteins. Native to Africa but well-established across northern Australia. They form super-colonies with many queens, making them hard to control.
How to identify
- Two worker sizes in the same trail — tiny minors and big-headed soldiers
- Pale brown to yellowish
- Sand mounds between pavers and along pathways
- Preference for oily/greasy foods and proteins over sugar
Pro Tip
These ants prefer protein over sugar. Use a protein-based bait, not a sweet one.
General guidance only. Information on Home Pest Defence is provided for educational purposes and is not a substitute for professional advice. For termites, venomous spider bites, wasp nests in walls, or protected wildlife, contact a licensed pest controller, your GP, or the relevant state wildlife authority. In emergencies call 000; for poisoning call 13 11 26.