Polyrhachis alata

This is a smaller member of the spiny ants but just as well armoured, which makes it a neat, manageable way to keep the genus look at home. It forgives the slips of a first colony, and with no sting and only a mild bite it stays calm to handle and watch. The colony tops out at a size that fits an ordinary setup rather than demanding ever more space. A good pick for a beginner who wants the classic spiny-ant appearance in an approachable, low-stress species.

Like the rest of the genus, alata is a sugar-loving omnivore that tends honeydew and sweet liquids while hunting small insects for the brood. Keep a carbohydrate source on offer at all times and serve protein two to three times a week; seeds are ignored.

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

Start the queen in a test tube and shift the colony once founding workers blanket the floor. Coming from humid Sri Lankan forest, this species wants a damp, moisture-retaining nest such as aerated concrete (Ytong), gypsum or a hybrid build held steadily wet. As an agile climber it does best with a moist or planted arena offering bark and branches. These ants scale walls readily, so maintain a firm fluon (PTFE) or oil rim, or talc and water. An ANTonTOP formicarium or starter kit comes humidity-matched with arena and barrier together.

With no winter rest to manage, keep it warm, humid and active throughout the year. From tropical Sri Lanka, alata prefers nest 24-27 °C and arena 25-29 °C, with nest humidity 70-85% and arena 60-75%. Warm one end of the arena to give a gentle gradient the colony can choose along.

Build-up is moderate at the usual tropical pace, with a single queen leading the colony toward as many as 5,000 workers in time. Your colony arrives as the queen with her workers and brood, ready to move into a humid nest.

• Polyrhachis are famous for using larval silk as a building material, a behaviour that evolved alongside the spiny armour seen across the genus.
• The mesosoma and waist spines work as passive defence, letting these unarmed ants shrug off attackers without a sting.
• The genus is overwhelmingly arboreal and Old-World, thriving in the forests of Asia, Africa and Australia rather than on the ground.
• Even the smaller Polyrhachis carry the full set of protective spines, so body size says little about how well defended a worker is.

Is this a good beginner ant?

Yes, it is rated Beginner, gentle and has no sting.

Does this spiny ant need a winter rest?

No, it is tropical, so keep it warm and active year-round.

Does Polyrhachis alata sting or bite?

No, there is no sting and only a mild bite.

How big does the colony get?

A single-queen colony can grow up to 5,000 workers.

How large is the queen?

The queen is 7.5-10 mm, with workers at 5.5-8 mm.

How fast does it grow?

Growth is moderate for a tropical spiny ant.

What do spiny ants eat?

Sugar water, nectar or jelly and fresh insects; it does not take seeds.

Will the ants arrive alive?

Yes, queen, workers and brood ship with 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.