Why these aggressive termites are known as the super-termite of the southern United States

Nature · Published 3 October 2026 Swipe more like this →

In short: Formosan subterranean termites are not just pests; they are structural threats capable of forming colonies with millions of members. Known for their aggressive defense and massive foraging ranges, these invasive insects have spread across the southern United States, causing significant damage to homes, boats, and trees through their relentless consumption of wood.

Native to Taiwan and southern China, Coptotermes formosanus has become a formidable invasive species. While first described in Hawaii in the late 1800s, their presence in the continental United States was recorded in the 1960s, likely facilitated by maritime transport and the global shipment of goods. Today, they are established throughout the southeastern United States, with reports reaching as far north as Virginia and as far inland as Tennessee, as well as parts of southern California.

These termites are social insects that thrive in underground colonies containing several million individuals. A central nest houses the royal pair—the queen and king—while satellite nests are established near food sources. Workers, the only caste capable of digesting cellulose with the help of gut endosymbionts, are responsible for all structural damage. They forage over vast distances, documented at up to 100 meters in field conditions and 300 meters in laboratory settings. Their reputation as an aggressive species stems from their high soldier-to-worker ratio, which reaches 10% to 15%, compared to just 1% to 2% in native termite colonies.

When threatened, these soldiers exude a white, glue-like defensive secretion from a specialized head opening called a fontanelle. This behavior, combined with their ability to consume wood at a rapid rate, makes them the most economically important and difficult-to-control termite species in the southern United States. Damage can be severe, often costing thousands of dollars per home, and in extreme cases, requiring total demolition. Because they are social and rely on trophallaxis—the exchange of food between members—to distribute nutrients, their biology remains a primary focus for researchers developing effective baiting and control strategies.

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