Camponotus maculatus subnudus is a large, mobile carpenter ant with contrasting abdominal markings and a pronounced range of worker sizes. A dark head and thorax are combined with pale spots along the sides of the abdominal tergites. As the colony develops, ordinary workers are joined by intermediate forms and broad-headed majors, so its visual character changes noticeably as the population grows.

Size and colony structure

The source gives a length of up to 14–16 mm for majors and 16–18 mm for the queen. This polymorphism has practical husbandry consequences. Large individuals need a sufficiently tall and spacious living area in which they can turn without scraping their antennae or legs against the chamber walls. The ants are also described as fast, active, and ready to defend the nest, which should be considered during feeding and routine formicarium maintenance.

Their range is associated with tropical and subtropical parts of South and Southeast Asia, including India, Myanmar, and Sri Lanka. The input describes Camponotus maculatus subnudus as an inhabitant of monsoon-influenced regions and as a mesophilic form requiring steady warmth together with a clear separation between moist and dry nest areas.

A moisture gradient, not constant saturation

This carpenter ant needs access to distinct conditions. One section of the nest should remain hydrated, while dry, warm chambers provide places for cocoons and resting majors. Persistent saturation and stagnant moisture are identified as threats to the queen and brood because of impaired air exchange and the possible development of fungi.

For that reason, the source advises against a fully gypsum system in which the whole living area is moistened in the same way. Its preferred arrangement is a partially gypsum nest: the absorbent block occupies only part of the interior, allowing the ants to choose between moist and dry zones. A gypsum share of 25–30% of the living area is stated for the particular design discussed in the source. This is a specification of that product concept, not a proven universal ratio for every formicarium.

Construction and materials

The source discusses a nest with the following features:

• a partial block made from high-strength G23 gypsum;
• a PETG body;
• living chambers at least 12 mm high;
• separate humid and dry sections.

A chamber height of 12 mm or more is intended to accommodate the large queen and majors. PETG is presented as the body material for a setup that may be locally heated. However, claims that it is of a “medical” grade, entirely chemically inert, or categorically safer than other plastics are not supported by technical certificates in the input and should not be treated as verified material properties.

The source advises against expanded foam and polystyrene for internal barriers. The practical concern is that the powerful mandibles of large workers may damage a vulnerable material, creating an escape route. It also claims that heated foam releases styrene, but without the composition, temperature, and test data for a particular product, that statement cannot responsibly be applied to every foam material or enclosure as an absolute rule.

Warmth and seasonal routine

The recommended year-round temperature range is 24–28°C. This is described as a tropical ant that does not require a winter diapause. If local heating is used, it should establish a warm section without preventing the colony from retreating to a cooler area. The input does not specify heater wattage, placement, or an acceptable surface temperature. Those parameters must be selected for the actual enclosure and checked with suitable measuring equipment.

Feeding brood and large workers

The stated diet includes both carbohydrate and protein foods:

• sugar or honey syrup diluted at the stated ratio of 1:3 or 1:4;
• cockroaches and crickets as feeder insects;
• feeding jelly described as containing carbohydrates and vitamins.

Protein feeding is associated with brood development and the production of large workers. The source discourages fruit flies because of their claimed ratio of chitin to useful nutrients, but it supplies neither a comparative analysis nor a feeding standard. Excluding Drosophila should therefore be understood as the source’s recommendation rather than as a demonstrated prohibition. Portion size and feeding frequency should follow colony size and actual consumption, with remains removed before they spoil.

Questions and answers

Does Camponotus maculatus subnudus require diapause?
No strict winter diapause is specified. The recommendation is to maintain 24–28°C throughout the year and avoid exposure to freezing temperatures.

Why is a partially gypsum nest preferred?
It gives the ants a choice between a hydrated section and dry chambers. Constant moisture across the entire nest is described as unsuitable for this form.

When do majors appear?
The source associates the first large intermediate workers with a population of roughly 20–30 ants and full soldiers with a colony exceeding 50 individuals under generous protein feeding and local heating to 28°C. This is an approximate observation, not a guaranteed schedule; the development of an individual colony may differ.

What matters when selecting a formicarium?
It should offer spacious chambers for a 16–18 mm queen and majors reaching 14–16 mm, distinct wet and dry zones, barriers resistant to chewing, and provision for controlled local heating.