Polyrhachis bicolor

The two-tone body is the draw here, the colour split standing out against the genus’ usual gloss and giving the colony real shelf appeal. It is a relaxed introduction to tropical keeping: an unhurried Bornean forager that forgives the odd slip while you settle into the rhythm. No sting and only a mild bite keep it safe to watch at close range, and with no winter pause the colony stays busy all year, so there is always something to see. An easy, good-looking start.

Bicolor feeds the way most arboreal Polyrhachis do, splitting the work between sugar and meat: workers drink sweet liquids for their own energy and bring back insect protein to drive brood development. Offer a constant carbohydrate source and protein two or three times a week.

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

Begin a young colony in a test tube or small starter nest with a chamber the workers can keep damp, since this is a moisture-loving climber. Upgrade only once founding workers blanket the floor. A nest in aerated ytong or acrylic suits its arboreal habits far better than a dry stone block. Coat the arena rim thoroughly with fluon (PTFE), oil, or talc and water, because these ants slip over smooth edges quickly. ANTonTOP formicaria and starter kits ship as a matched humid nest, arena and barrier in one set.

Heat just one side so a gradient forms and the ants can pick their own comfort spot. Aim for 20-26 °C in the nest with the arena slightly warmer at 22-32 °C, and pair nest humidity of 55-70% with a drier 40-60% out in the foraging space. There is no hibernation here; as a tropical species it stays active all year and should be fed in every season.

Expect a moderate, even pace typical of tropical spiny ants, the colony working its way up toward 500-5000 workers as it matures. You receive a queen together with workers and brood, set to continue straight away in a warm, humid formicarium.

• Polyrhachis is one of the largest of all ant genera, with hundreds of described species spread across the Old World tropics from Africa to Australia.
• Workers carry cuticular spines on the thorax and waist that act as body armour, the feature that earns the group its ‘spiny ant’ name.
• Belonging to the Formicinae, it lacks a sting and relies on formic acid and its mandibles for defence.

Is Polyrhachis bicolor good for beginners?

Yes, it is a beginner-rated spiny ant that forgives early mistakes.

Does Polyrhachis bicolor need a winter rest?

No, it is tropical with no hibernation, so keep it warm and fed all year.

Does the two-toned bicolor sting or bite?

No, it has no sting and only a mild bite.

How big does a bicolor colony get?

It can reach 500-5000 workers.

How large is the bicolor queen?

The queen is about 11 mm and workers are 6-9 mm.

How fast does it grow?

It grows at a moderate, steady pace once the first workers appear.

What does this spiny ant eat?

Sugar water or nectar plus live insects such as crickets and flies.

Will it arrive alive?

You receive a queen with workers and brood, packed with a heat or cool pack and shipped 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.