Workers approximately 5–7.5 mm long. Frederick Smith’s original description gave a worker length of 2½–3½ lines, equivalent to approximately 5.3–7.4 mm. Minor workers examined in a modern taxonomic study had head widths of approximately 1.46–1.59 mm.
Fine-art photographic collection
Colobopsis badia
An arboreal opportunistic omnivore.
About this species
Colobopsis badia(Smith, 1857)
Information reviewed19 July 2026
Colobopsis badia is an arboreal ant of tropical South and Southeast Asia. Workers forage across leaves, lianas and tree trunks, while the colony is thought to nest in cavities higher in the canopy. It belongs to the remarkable Colobopsis cylindrica group—ants distinguished by greatly enlarged mandibular glands and unusual defensive adaptations.
Taxonomy
Animalia → Arthropoda → Insecta → Hymenoptera → Formicidae → Formicinae → Camponotini → Colobopsis → Colobopsis badia
Accepted · checked 2026-07-19
South and Southeast AsiaBroad documented localities — not a complete range map.
Recorded in the Indomalayan region, including India, Sri Lanka, Thailand, Malaysia, Singapore, Borneo and Indonesia. The species was originally described from material collected in Singapore and Sarawak, on Borneo. Records should be interpreted cautiously because several closely related Colobopsis species were historically confused under a small number of names.
Tropical forest and wooded habitats, principally on vegetation and in the tree canopy. In southern Thailand, workers were observed foraging on leaves, low vegetation and lianas connecting two trees. The nest entrances were not located but were considered likely to be higher in the trees.
Primarily observed foraging during daylight on leaves, lianas and tree trunks. Workers travel along established routes between vegetation and the presumed canopy nest. Detailed seasonal and daily activity patterns have not yet been documented specifically for this species.
An opportunistic omnivore. Like other members of the Colobopsis cylindrica group, workers probably obtain much of their nutrition by grazing microbial and fungal films from leaf surfaces. Field experiments also demonstrated that C. badia accepts animal prey, providing direct evidence that its diet is not exclusively based on plant-surface resources.
A social, arboreal species with distinct reproductive and worker castes. Workers forage along vegetation-linked routes leading towards an elevated nest. The number of queens, mature colony size and whether C. badia routinely occupies several interconnected nests have not been established conclusively for this species.
What makes this species remarkable?
This ant belongs to the Colobopsis cylindrica group—the celebrated “exploding ants.” Some members of this group defend their colonies by rupturing their bodies and releasing sticky, irritant gland secretions. However, that fatal behaviour has not yet been directly documented in C. badia itself.
Scientists once thought these canopy ants lived mainly by grazing microscopic films from leaf surfaces. Observations of C. badia accepting animal prey helped reveal that their diet is considerably more complex and includes predation.
The identity of C. badia remained uncertain for more than 160 years after its description. In 2018, researchers selected a specimen collected in Singapore by Alfred Russel Wallace as the lectotype—the single reference specimen that now fixes the meaning of the species name.