The Argentine Ant is one of the world's most invasive ants, displacing native ant communities wherever it establishes. Colonies from different parts of the world recognize each other as nestmates, forming a global 'supercolony' concept. In California, it has drastically reduced seed dispersal by native ants and disrupted mutualism networks. Workers form characteristic foraging trails up to several hundred meters long.
Best time to see a Argentine Ant
The best time to see a Argentine Ant is March–September, when about 60% of U.S. sightings happen, based on 11,723 research-grade iNaturalist observations.
Not certain it is a Argentine Ant? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Argentine Ant sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spotted an Argentine Ant?
Point Huck at any plant, bird, or animal and know for sure - plus a live map of where it is being spotted near you.