Swarms appear on warm and rainy days, around dusk, and continue into the evening. Formosan swarmers are often attracted to light. Ten million or more. The largest known single Formosan termite colony was found in a public library building in Algiers, Louisiana. The colony exceeded 70 million termites within a nest weighing approximately 600 pounds.
Termite shields are less effective.
Formosan subterranean termites will go through thin sheets of metal, mortar, PVC pipe, electric power lines and telecommunications lines to get to wood or cellulosic material. This termite will eat wood, paper, books, furniture anything cellulosic. If present in the structure, they are usually concentrated at the first-floor level. Prefers wet dead wood. Will not ordinarily infest living trees.