Carebara vidua

The fascination of this African marauder ant is the extreme gap between its near-microscopic workers and its large queen, a size contrast that makes founding and early growth absorbing to follow. It is largely cryptic and subterranean, though its nuptial flights run from late morning into the afternoon in the wild. Coming from East and Southern Africa in Sub-Saharan Africa, it relies on steady warmth and humidity. Those tiny workers also raise the stakes on escape control, so a fine-mesh, well-sealed setup is essential. Rated Pro, it suits an expert comfortable managing both the climate and the containment such small ants require.

A marauder that depends on insect protein to raise its brood, with a steady sugar source to keep the foragers active. Protein leads here, so supply plenty of prey alongside a reliable sweet feeder.

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

Begin this colony in a humid test tube or small damp nest sealed tight, since 1.5-2 mm minors slip through the smallest openings. Move up to larger moisture-holding nests as the population climbs into the hundreds of thousands, keeping each connection fine and secure. Keep an arena barrier of fluon (PTFE), a fine oil line, or talc and water, and inspect it often. ANTonTOP formicaria and starter kits give you humid, tightly sealed builds with matched arenas suited to a species this large.

Holding to its warm, humid range, keep the nest at 24-27 °C and the arena at 24-28 °C, with nest humidity 70-80% and the arena at 50-65%. Heat one side for a gradient so the colony can pick its spot, and keep the nest reliably moist. With no hibernation for this tropical species, hold conditions stable and feed the whole year.

Founding is slow, then growth picks up strongly, the colony able to reach up to 500,000 workers. It comes to you as a fertilised queen with workers and brood, already past the fragile founding phase.

• Carebara vidua shows one of the most extreme worker-to-queen size gaps known in ants, with pinhead minors under a queen many times their length.
• The queens are so much larger than their tiny workers that early naturalists struggled to believe the two belonged to the same species.
• Like other Carebara, the minute minors can pass through the smallest openings, so escape-proofing has to be meticulous.
• The genus is closely tied to the marauder and thief-ant lifestyle of nesting near and raiding other insects.

Is Carebara vidua good for beginners?

No, it is rated Pro and demands tropical care with very small workers, so it suits experienced keepers.

Does Carebara vidua need a winter rest?

No, this tropical marauder takes no hibernation; keep it warm and humid year-round.

Does the African marauder ant sting or bite?

Yes, it has a sting alongside a mild bite, so handle with care.

How big does the colony get?

Up to 500,000 workers.

How large is the queen?

The queen measures 13-16 mm, towering over 1.5-2 mm minor workers.

How quickly does the colony build up?

Slow at founding, then strong growth once the colony is established.

What does it eat?

Insect protein for the brood plus a constant sugar source.

Will it arrive alive?

Colonies ship with a queen, workers and brood plus a heat or cool pack, dispatched within 24 hours 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.

Care guide. See also our Carebara diversa care guide.