White-footed ants (Technomyrmex difficilis) are one of the most challenging ant species to eliminate in Florida. They are small (2.5–3mm), dark brown to black, and identifiable by their pale (yellowish-white) feet. What makes them uniquely difficult is colony size: a single supercolony can contain millions of individuals, with nests spread across multiple locations inside and outside a structure — attics, wall voids, under siding, in vegetation touching the home’s exterior.
White-footed ants are trophallaxis-negative, meaning they do not share food mouth-to-mouth the way most ant species do. This makes standard bait treatments largely ineffective — only the workers who directly feed on the bait die; the bait does not travel back through the colony to eliminate queens. Effective control requires a combination of perimeter exclusion, targeted direct nest treatment where accessible, and ongoing monitoring. A one-time treatment is rarely sufficient for heavy infestations.