The Myrmecia nigrocincta ant is a monogynous species with colonies consisting of several hundred workers. They have a medium development rate and are categorized by their size, with queens measuring 18-22 mm and workers measuring 15-21 mm. These ants have a dark red color with a black belly and distinctive sickle-shaped jaws. Their diet consists of food insects, fruit, and syrup. They thrive in arenas with a humidity level of 30-50%.