Fire ants gain a foothold across Ecatepec de Morelos
August 13, 2026
The has been turning up steadily around Ecatepec de Morelos for nearly two years now, and not as a single stray sighting. Community records span four separate neighborhoods, Tulpetlac, San Cristóbal Centro, Chulavista, and nearby areas, spaced two to seven kilometers apart, with observations running from August 2024 through this past May fairly evenly across the seasons. That pattern, spread across multiple sites and sustained over time rather than clustered around one event, points to an established population rather than a one-time hitchhiker riding in on nursery stock or a shipping pallet.This species built its reputation in the southern United States after arriving from South America, and it earns that reputation honestly. It forages aggressively, delivers a painful sting, and tends to displace native ants and other ground-dwelling arthropods wherever it settles in numbers. In grassland and xeric shrub country like the Interior Plains and Piedmonts with Grasslands and Xeric Shrub that surrounds this part of the Central Mexican matorral, that displacement matters beyond the ants themselves. Ground-nesting birds and reptiles rely on the same soil layer fire ants colonize, and a shift in the invertebrate base those animals feed on can ripple upward through the food web.The records so far are presence observations, not colony counts, so the true scale of the infestation is not yet known. But the geographic spread and the two-year persistence are enough to flag this population for a closer, targeted survey rather than filing it away as background noise.
