Species Insects & ArthropodsEuropean Fire Ant

European Fire Ant

Myrmica rubra

CommonInsect & Arthropod
Illustration of European Fire Ant (Myrmica rubra)
Safety note: Stings when disturbed in large numbers — can cause welts.

The European Fire Ant is a small, reddish-orange ant introduced from Europe that has become a serious invasive pest in northeastern North America. Unlike most ants, it forms super-colonies with multiple queens and can achieve extraordinarily high densities, outcompeting native ant species. Workers sting readily and in large numbers when disturbed, posing problems for gardeners and sensitive individuals.

Habitat
Gardens, parks, lawns, and moist woodland areas
Diet
Adults: insects, honeydew, seeds, and small invertebrates
How common
Common

Best time to see a European Fire Ant

The best time to see a European Fire Ant is April–July, when about 68% of U.S. sightings happen, based on 223 research-grade iNaturalist observations.

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Not certain it is a European Fire Ant? What bug is this? walks through what to check first and the lookalikes that catch people out.

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