Camponotus siemsseni

Lives in natural grassland. The body is a deep black that shows dark brown under light. While foraging it holds its gaster raised in alert, much like an acrobat ant; when threatened or disturbed it vibrates its body, opens its mandibles and charges forward in threat. It is among the largest ant species in Taiwan, with large majors, and is a fiercely defensive species, one of the very few carpenter ants that will attack live prey.