Camponotus castaneus

Few large carpenter ants are this kind to a beginner. Native to the USA, this species skips tropical fuss and does well at ordinary room warmth, and the queen can live around twenty years, so a colony becomes a long-term companion rather than a passing project. The handsome chestnut colouring gives it real shelf presence as it grows. Workers are nocturnal and crepuscular, busiest in the evening and after dark, which suits a keeper who likes to watch the colony once the working day is done.

These ants live on sugars day to day, so a steady nectar feeder keeps the workers content, and they rear brood on insect protein. Offer prey a couple of times a week and the colony does the rest.

★★★ readily · ★★ moderately · ★ occasionally · ✗ not eaten

This temperate North American carpenter ant founds best in a test tube; keep her dark until nanitics appear, then shift to a ytong or plaster nest held around 50-70% in the brood chamber. With a cap near 1,000 workers a mid-size nest sees the colony through, so upgrade only when the floor is well covered. They are confident climbers, so finish the rim with fluon, an oil barrier, or talc and water. ANTonTOP formicaria and starter kits cover the run from founding tube to a settled colony.

As a temperate North American species, it is happy at moderate warmth: hold the nest at 22-26 °C and the arena slightly broader at 20-30 °C, with nest humidity 50-70% and the arena at 50-60%. Heat one side only so the ants have a warm-to-cool gradient to choose from. A winter rest is not required; it may quieten in the cooler months, but you can keep feeding and there is no need to drop the temperature.

Founding is slow at first, then picks up momentum, with eggs reaching adult workers in roughly 6-12 weeks (about 45 days is typical). Over the seasons the colony climbs toward 1,000 workers. Your colony ships as a laying queen with workers and developing brood.

• This is one of the larger carpenter ants of the eastern US, known for its warm chestnut colour that gives it the common name chestnut carpenter ant.
• Nuptial flights run mainly in June and July and take place at night, which fits the workers’ dusk-and-dark foraging habit.
• Queens of large Camponotus are remarkably long-lived for insects, so a single founding queen can head a colony for many years.
• Defence is a sharp bite and formic acid rather than a sting, the rule across this subfamily.

Is Camponotus castaneus good for beginners?

Yes, it is rated beginner and tolerates normal room conditions, which makes it one of the easier large carpenter ants.

Does the chestnut carpenter ant need a winter rest?

Hibernation is not required; it may slow down when cool, but keep feeding and you do not need to lower the temperature.

Does Camponotus castaneus sting or bite?

No, just a mild bite and no sting.

How big does the colony get?

Up to 1,000 workers at maturity.

How large is the queen?

The queen is 17-18 mm.

How fast does it grow?

Eggs reach worker stage in roughly 6-12 weeks (about 45 days typical), founding slowly then accelerating.

What does it eat?

Sugar water or jelly plus insects such as crickets and flies; seeds are not part of the diet.

Will it arrive alive?

Yes, we send a queen with workers and brood plus a heat or cool pack, dispatched within 24 h with tracking.

Escape prevention. Coat the inner rim of every open arena with fluon (PTFE), or use talc-and-water or an oil barrier as a backup, and keep a tight, fine-mesh lid on top. Check the barrier regularly, since dust, condensation and feeding debris break a fluon line over time. Keep tubing connectors tight and seal any gaps in the nest.

Keeping reminders. Always offer fresh water and never let the nest dry out completely. Give carbohydrates continuously and protein a few times a week, and remove uneaten insect prey within 24 hours before it moulds. Keep the formicarium out of direct sunlight and away from constant vibration, which stresses a young colony. A water-filled test tube plugged with cotton makes an ideal spare incubator whenever you need one.

Before you buy – do not rehouse too early. Have a test-tube setup or a small formicarium with an outworld and a working barrier ready before your colony arrives. A founding colony grows slowly at first, which is normal. Moving a small colony into a large nest too soon invites mould, mites and stress, and the workers die off one by one. Keep the colony in its open test tube on the arena, plug the nest entrance with cotton, and open up the next chambers only once the colony fills roughly 10-15% of the space.

What we ship. Every colony ships with a live-arrival guarantee, backed by our 24h unboxing-video guarantee: if the queen does not arrive alive, we reship free. Parcels travel with DHL, InPost (PL) or EMS, with a heat or cold pack to suit the season, packed discreetly and securely. We ship across the EU and worldwide, with free shipping over the Europe threshold.