Cataulacus granulatus

Set this one next to a typical garden ant and the difference is immediate: its body is heavily sculptured and granulated, giving it an armoured, almost prehistoric look. It comes from the warm, humid forests of South and Southeast Asia, where it lives up in the trees and moves with a deliberate, unhurried gait that is a pleasure to watch up close. The colony stays compact, so it fits a modest setup without crowding. The main ask is steady tropical warmth and high humidity; manage those and it is a straightforward, rewarding ant for a keeper wanting something off the beaten track.

An arboreal omnivore that gathers sugars and honeydew up in the canopy and takes small insects for the brood, foraging out in daylight. Keep a sugar source available at all times and offer protein two or three times a week.

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

Found this armoured tropical ant in a test tube and move it on once the first workers floor it. As an arboreal genus it nests in hollow wood, so a ventilated nest that holds humidity without going stagnant suits it best, aerated concrete or a 3D-printed cavity design, kept warm and moist, with a roomy arena. The smooth-bodied workers scale glass, so seal the rim with fluon (PTFE), oil, or talc and water. ANTonTOP formicaria and starter kits are sized for this warm, humid arboreal setup.

A warm, humid tropical setup is what it wants. Keep the nest at 24-27 °C and the arena at 25-29 °C, with high humidity throughout: 70-85% in the nest and 60-75% in the arena. A gentle gradient from warming one end lets the colony choose its spot while the air stays moist. There is no hibernation here, so keep it active and warm right through the year.

Growth is gradual, as it tends to be for tropical arboreal ants, building to a compact colony of up to 1,000 workers. Steady warmth, humidity and protein keep it progressing without rushing. Your colony arrives as a queen with workers and brood, ready for a humid, warm home.

• Cataulacus ants are armoured and deeply sculptured, their bodies covered in pits and ridges that give the genus its rough, granular look.
• These canopy dwellers are known to drop or even glide from a branch when disturbed, falling clear of the threat and steering back to the trunk.
• They nest in hollow twigs and dead branches and can deliberately block a tunnel using a worker’s heavily armoured body.

Is Cataulacus granulatus good for beginners?

It is Intermediate, simple to keep once you can hold high humidity and steady tropical warmth.

Does Cataulacus granulatus need a winter rest?

No, it is a tropical species and stays active and warm year-round.

Does this armoured tree ant sting or bite?

Yes, it has a mild sting and can also give a mild bite, though it is a small, defensive ant.

How big does the colony get?

A compact colony of up to 1,000 workers under one queen.

How big is the queen?

The queen is 7-9 mm, with workers at 5-6 mm.

How quickly does the colony build up?

Gradual, as is typical for the genus, with steady warmth, humidity and protein.

What does it eat?

Small insects such as crickets and flies plus sugar water, nectar or jelly; mealworms in moderation.

Will my Cataulacus granulatus arrive alive?

Yes, it ships as a queen with workers and brood, with a heat or cool pack, dispatched within 24 hours 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.