Argentine ants
Linepithema humile
Small light to dark brown ants (about 2–3 mm) that form massive colonies with multiple queens. They move in distinct trails and are among the most widespread ants in South Africa. In the Western Cape they have invaded much of the coastal belt and are often the dominant house ant—residents frequently report rivers of little brown ants in summer.
- Distinct trails to food and water
- Tiny cracks used as entry points
- Strong in numbers; persists after surface spray
- Often peaks in warmer months
Cape Town and the coastal belt are classic Argentine ant territory. Colony elimination with baiting is essential.