The soldier caste protects the colony from invasion by other insects. Soldier termites are fed by the worker termites as they are unable to feed themselves. Alates are winged reproductive that fly from the nest in their thousands eager to establish a new colony. Because alates are poor flyers they generally only fly some 50 to 100 m from the parent nest. As such, when observing flying alates you can generally be assured a termite nest is nearby. Worker termites are continuously and randomly foraging for new food sources. This behaviour means the traditional methods for managing termites, i.e. Chemical and physical barriers, are frequently found to be ineffective as the termites find areas of weakness where these barriers may have been inadvertently breached.