Odontomachus aciculatus

The trap-jaw strike is one of the great sights in the hobby, and aciculatus delivers it: its mandibles latch open and fire shut at a speed the eye can barely follow, both to seize prey and to fling the ant clear of danger. It is a single-queen species that stays a manageable display size, so the focus is on that hunting behaviour rather than population. It comes from Borneo, a warm and humid tropical region, and that origin shapes every care decision you make. The Pro rating suits keepers who have run a tropical genus before and want a real predator; for them, this one earns its keep.

A hunter that lives on live prey. Workers stalk insects with their jaws cocked wide open, then fire them shut to pin the catch, and the adults also take sugars for energy.

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

House this trap-jaw in a humid nest with a deep substrate layer and a roomy hunting arena, since the species forages a lot in the open. Start a young colony in a compact setup and upgrade once workers fill it and the brood piles build. As a tropical forest ant it wants a Ytong or hybrid nest that holds moisture, never a dry one. Coat the arena rim with fluon (PTFE), oil, or talc and water to stop escapes. An ANTonTOP formicarium or starter kit pairs that damp nest with a hunting arena ready for it.

Tropical forest sets the parameters here, so keep the nest at 24-27 °C and the arena at 25-29 °C, with humidity high at 70-85% in the nest and 60-75% in the arena. Heat one side only so the colony can choose its spot along the gradient. There is no hibernation, so keep it warm, humid and fed through every season.

Expect a steady tropical pace once the queen is laying well, with the colony reaching up to 500 workers over time. It comes to you as a queen with workers and brood already developing.

• The cocked mandibles are held open under tension on a latch and released by a touch to long trigger hairs, firing shut in well under a millisecond.
• Odontomachus can turn that strike on the ground or an attacker to fling themselves bodily through the air, an escape jump that launches the ant clear of danger.
• Founding here is semi-claustral, so the lone queen leaves the nest to hunt while raising her first workers rather than sealing herself in.
• The genus is one of several ant lineages to evolve the trap-jaw independently, a weapon convergent with Myrmoteras and others.

Is the Borneo trap-jaw ant good for beginners?

No, it is rated Pro, best for keepers with tropical experience.

Does Odontomachus aciculatus need a winter rest?

No, it is tropical and stays active year-round; just keep it warm and feeding.

Does this trap-jaw ant sting or bite?

Yes, it can sting and the sting is painful, so handle with care.

How big does the colony get?

Up to 500 workers, with one queen.

How large is the queen?

Around 10-13 mm, with workers at 10-12 mm.

How fast does it grow?

A steady tropical pace once the queen settles and brood piles build.

What does it eat?

Insects as the main protein plus sugar water, nectar, or jelly for energy.

Will it arrive alive?

You receive a queen, workers, and brood with a heat or cool pack, shipped in 24 hours with tracking for a safe live arrival.

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.