Odontomachus haematodus

A trap-jaw is built around one piece of machinery: long mandibles cocked wide open and held under tension, then fired shut on contact to stun prey or kick the ant clear of danger. This American species hunts live food and runs most of its action after dark, so the colony comes alive when the lights drop. The queens are long-lived, so an established nest is a multi-year project rather than a quick win. The tropical care and live-prey routine put it firmly in expert territory, but for a keeper who enjoys watching a predator work, it earns its place.

A sit-and-wait hunter that tracks moving prey by sight and slams its sprung mandibles shut on contact. Live or freshly killed insects build the brood, while foragers top up on sugars for their own energy.

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

Found the colony in a test tube and move it on once the first nanitics are out and the floor is busy. These trap-jaws come from damp forest soil, so give them a moisture-holding nest in Ytong, gypsum or a hydratable hybrid kept reliably wet on one side. Pair it with a roomy arena, since they hunt hard and range further after dark. They are quick climbers, so coat the arena rim with fluon (PTFE), oil, or talc and water. ANTonTOP formicaria and starter kits bundle the damp nest, arena and barrier as one tropical-ready set.

Warm and damp is the whole story for this tropical ant: settle the nest around 24-27 °C and let the arena sit a touch higher at 24-28 °C. Hold nest humidity high at 75-90% and the arena at 65-80%. Heat one side only so the colony can shuffle along a gradient to its preferred spot. There is no winter rest here: keep warmth and feeding steady right through the year.

Expect an unhurried tropical build rather than a sudden surge, and because the queen lives for several years the colony can edge toward 500 workers over the long haul. Pace your nest upgrades to the brood piles. Your colony arrives as a queen with workers and developing brood, ready to settle into a humid setup.

• Odontomachus mandibles deliver one of the fastest self-powered strikes measured in any animal, closing in roughly a tenth of a millisecond.
• The strike doubles as an escape trick: a worker can fire its jaws against the ground or an attacker and catapult itself clear of danger.
• The trigger is hair-fine. Sensory hairs inside the open jaws set off a reflex among the quickest known in the animal world, on the order of a few milliseconds.
• Foragers hunt largely after dark and rely on good eyesight, unusual among ants that mostly navigate by scent.

Is this American trap-jaw ant good for beginners?

No, it is a Pro species for keepers experienced with tropical ants.

Does Odontomachus haematodus need a winter rest?

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

Does this trap-jaw ant sting or bite?

Yes, the sting is painful, so take care.

How big does the colony get?

Up to 500 workers under a single queen.

How large is the queen, and how long does she live?

Around 10-12 mm, with workers at 10-11 mm, and she can live several years.

How fast does it grow?

A steady tropical pace, building over a multi-year colony life.

What does it eat?

Mainly insects, with sugar water, nectar, or jelly for energy; it hunts more at night.

Will it arrive alive?

You get a queen, workers, and brood with a heat or cool pack, shipped within 24 hours and tracked for safe live delivery.

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.