Invasive alien species have been identified as a major threat to biodiversity. No less than 3,500 alien species were found in Thailand, and more species have continued to be introduced for commercial and agricultural purposes, as well as for being used as pets and ornamental plants. Some alien may become invasive and have adverse impacts on biodiversity as well as cause notable economic and social loss. Listing invasive alien species is therefore required to enable prevention, control, elimination and utilization of invasive alien species in conservation areas and areas of importance to biodiversity of various ecosystems.