Banded sugar ant 20 cm (8 in) in diameter and usually funnel-shaped and ephemeral. Mounds are not constructed in undisturbed regions where land degradation has not occurred. Instead, the entrance of a nest consists of a smooth-walled vertical shaft that is in diameter. Chambers in the nest have a similar appearance to the nest entrance (shaft-like walls), and the floors within the chambers are typically in length with an arched roof that is in height. Excavated meat ant nests show that banded sugar ants will also inhabit them. Banded sugar ants are the dominant group of nocturnal ants in their range. Workers are
Green-head ant out and forage to support their young. Another way colonies are formed is through budding, where a subset of the colony leaves the main colony for an alternative nest site. The green-head ant is known for its painful and venomous sting that can cause anaphylactic shock in sensitive humans. However, they can also be beneficial to humans, acting as a form of pest control by preying on agricultural pests such as beetles, moths and termites. The green-head ant was first described in 1858 by British entomologist Frederick Smith in his "Catalogue of Hymenopterous Insects in the Collection of the British