Camponotus tonkinus is a large Asian carpenter ant distinguished by its dark coloration, powerful outline, and visible activity in the foraging area. The colony becomes increasingly engaging as it develops: workers explore available space, collect carbohydrate food, and hunt feeder insects, while the emergence of heavy-headed soldiers adds a striking contrast between castes.

Appearance and caste structure

Color ranges from deep black to dark brown, with a subdued sheen across the chitin. The body retains the familiar, balanced proportions associated with Camponotus, and the difference between ordinary workers and major soldiers is easy to appreciate. A queen reaches 15–16 mm, while large soldiers measure 12–13 mm. Their expanded heads and strong mandibles give mature colonies a particularly substantial appearance.

Workers are active explorers of the arena and readily investigate newly available areas. As the population increases, foraging becomes more conspicuous. The nest and arena should therefore be selected with future growth in mind instead of being sized solely for the colony’s starting configuration.

A controlled moisture gradient

This species should have access to both humid and relatively dry nest areas. A moistened section gives larvae a suitable location, while drier chambers allow the ants to arrange cocoons away from excessive moisture. The aim is a usable gradient rather than uniformly wet chambers throughout the entire nest.

A partially plaster-based formicarium offers one way to create that division. In the described arrangement, PETG forms the body and dry chamber surfaces, while a separate G23 plaster block provides the humidification area. A fully plaster nest may also be used when its moisture level can be monitored and distinct moisture conditions remain available inside.

Nano-sponge humidification systems require close inspection because their condition can change as they dry or collect contamination. Whatever nest material is chosen, lids, connectors, ventilation openings, and chamber joints should be checked for gaps that workers could pass through. PETG construction does not remove the need for routine escape checks.

Temperature and routine checks

The stated keeping range is 24–28°C. Both temperature and moisture should remain stable, without abrupt changes. Add water to the humidification module gradually and observe how far it spreads through the plaster. Overfilling may eliminate the dry zone, whereas prolonged drying can leave the brood without an appropriately humid section.

Before introducing the colony, confirm:

• a humid brood area and a separate drier area for cocoons;
• secure lids, connectors, and ventilation points;
• safe access for adding water without flooding chambers;
• enough arena space for feeding and exploration;
• a stable temperature within the stated 24–28°C range.

Feeding

Sugar syrup or honey syrup supplies the carbohydrate portion of the diet. Offer a small amount and remove residue before it soils the feeder or arena. Feeder insects provide protein; crickets and cockroaches are the options specified for this species. They should be crushed before being placed in the arena, making the food accessible and reducing the risk posed by live prey.

Protein food is especially relevant while larvae are developing and the colony is producing large workers. Adjust each portion to the number of ants and their current appetite. Insect remains should not be left in the arena for extended periods, as uneaten organic material can quickly compromise cleanliness.

Reading the colony’s behavior

Brood placement provides useful feedback about the nest environment. Larvae being gathered near the humid section and cocoons being carried toward dry chambers can help the keeper understand how the colony is using the gradient. The living area can be expanded as numbers rise, while the arena should remain accessible enough for regular feeding and removal of waste.

Questions and answers

Is Camponotus tonkinus suitable as a first colony?

Keeping it calls for an understanding of moisture gradients, regular feeding, and temperature control. A new keeper should prepare the nest in advance and become comfortable with gradual, measured humidification.

Which nest design is appropriate?

Choose a design that provides humid and dry areas at the same time. A PETG body with a G23 plaster block is one described configuration. A fully plaster formicarium can also be considered when its moisture distribution is kept under control.

What does the colony eat?

Provide sugar or honey syrup for carbohydrates and crushed feeder crickets or cockroaches for protein. Use portions the colony can consume and remove leftovers promptly.