It’s scary that it can happen so quickly. ~ American entomologist Andrew Suarez
Big-headed ants are named after their soldiers, which are larger than other workers and have outsized heads. These ants are aggressively invasive.
The environment influences how large big-headed ant soldiers become. If they face fierce competition from local ants, soldiers grow even larger heads, with commensurately prodigious mandibles that are their weaponry.
Big-headed ants are not the only combative ant that adjusts its size to suit its habitat. Fire ants begin morphing their body size within 60 days to meet environmental demands.