Monomorium pharaonis

Monomorium pharaonis is one of the most prolific ants you can keep. Several queens work together rather than competing, and the colony grows at a pace that few species can match, becoming a constant churn of minute workers. Originally from tropical Asia and long established across Egypt, it is now an indoor cosmopolitan found worldwide, so it thrives at steady warm room conditions with no cool rest. Founding is easy, but the explosive growth and tiny size make a tight escape barrier and careful planning essential. It suits a keeper who wants to manage a fast, huge colony rather than a slow showpiece.

A minute omnivore with a famous sweet tooth. The workers run the colony on sugars and carry small insect prey and protein back to the many laying queens, so keep sugar out constantly and feed protein often.

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

Found tiny colonies in a test tube and seal every joint, since these are among the smallest workers you will keep. As numbers climb, move to a humid plaster, acrylic or ytong nest with a slightly drier arena, and add larger formicaria and modules early, as this species can grow vast. Keep nest humidity high. Apply a fresh, well-laid escape barrier of fluon (PTFE), oil, or talc-and-water and renew it often. ANTonTOP formicaria and starter kits pair a fitting nest with an arena and barrier to keep a fast colony contained from day one.

Steady tropical warmth is the rule: nest 25-28 °C, arena 25-30 °C, with a humid nest of 60-75% and an arena of 50-65%. Heat one end only with a small cable or mat so the ants choose their own zone. This tropical species takes no hibernation, so keep it warm and fed all year with no cool rest.

Growth is fast and the polygyne structure pushes it harder still, so colonies can reach up to 1,000,000 workers over time. You receive one or more fertilised queens with workers and brood, since the species runs on many queens at once.

• Despite the name, the Pharaoh ant did not come from Egypt; the species was misnamed by Linnaeus and is thought to be Asian in origin.
• It is now one of the most widespread indoor pest ants in the world and a notorious problem in hospitals.
• Mating happens inside the nest and new colonies form by budding, so it never swarms and is hard to bait out.
• Its trail pheromones and colony behaviour have made it a long-running subject of laboratory research.

Is Monomorium pharaonis good for beginners?

It is rated Intermediate. Founding is easy, but the tiny 1.5-2 mm workers and explosive growth need a careful escape barrier and planning.

Does the Pharaoh ant need a winter rest?

No. It is a tropical species, active year-round with no cool rest, just keep feeding through winter.

Does the Pharaoh ant sting or bite?

It has a mild bite and a sting, but it is not dangerous to keepers.

How large does the colony get?

Up to 1,000,000 workers, as it is polygyne with multiple egg-laying queens.

How big is the queen?

The queen measures 4-5 mm; workers are 1.5-2 mm.

How fast does a Pharaoh ant colony grow?

Fast, the multi-queen polygyne structure drives rapid worker production.

What does it eat?

Sugar water or jelly for energy plus insects like crickets and flies for protein; it does not eat seeds.

How do you ship live ants?

We send a queen with workers and brood plus a seasonal heat or cool pack, dispatched within 24 h with tracking for 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.