Myrmecia varians

Myrmecia varians has the temperament that makes bull ants such a draw: alert, fast and quick to defend, with the big eyes and confident posture the genus is known for. It forages by day, so the colony is active when you are likely to be watching, and it hunts live prey by sight. Founding is semi-claustral, which means the queen leaves the nest to hunt while raising her first brood, keeping the early stage involved. The sting is painful and the Crazy rating is honest, so this is one for keepers who already run defensive species and want a bold single-queen predator.

A visual predator that hunts live and freshly killed insects by day, seizing them with toothed jaws and a sting. The prey feeds the larvae, while foragers take sugar water and nectar to keep their own reserves up.

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

Found this small bull ant in a test tube and rehouse it once workers outgrow the space and brood builds. A small ytong or acrylic nest at moderate humidity keeps the colony secure rather than scattered, joined to a generous arena for an active hunter to forage in. Use fluon (PTFE) on the arena rim, with talc and water as a backup, since a fast genus needs a barrier it cannot beat. ANTonTOP formicaria and starter kits cover this nest-and-arena layout straight out of the box, escape barrier included.

Hold the nest at 20-25 °C with the arena slightly warmer at 22-27 °C. Aim for nest humidity of 60-75% and keep the arena drier at 50-65%. Heat one end only to form a gradient the ants can choose from. Hibernation is not required, so keep the colony active and feeding right through the year.

Growth is controlled and steady rather than a population spike, with brood taking around 13-22 weeks (3-5 months) to mature and a colony reaching up to 1,000 workers in time. Genus queens can live up to 15 years, so the build unfolds across many seasons. You receive a queen with workers and brood, an established founding group from the outset.

• Even at a smaller size, this ant keeps the genus signature: big eyes and the visual hunting that sets bull ants apart.
• Myrmecia foragers hunt alone, an ancient habit lost in most of the trail-following ants kept today.
• The genus is almost entirely Australian, where bull ants fill the role of large day and night predators.
• Their venom is medically significant locally and can provoke strong allergic responses, so the sting is no token threat.

Is Myrmecia varians good for beginners?

No, it is rated Crazy, semi-claustral, and stings, so it is best for experienced keepers.

Does Myrmecia varians need a winter rest?

No, hibernation is not required; keep it active and feeding all year.

Does this bull ant sting or bite?

Yes, the sting is painful and rated Schmidt 2-3.

How big does a Myrmecia varians colony get?

Up to 1,000 workers at maturity.

How large is the queen?

The queen is 17-19 mm; workers are 14-17 mm.

How fast does Myrmecia varians grow?

It grows steadily and in a controlled way, not explosively.

What does it eat?

Sugar water or nectar plus live insects such as crickets and flies; seeds are not eaten.

Will it arrive alive?

Yes, it ships with a heat or cool pack, within 24 h, with tracking for 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.