Common Ant Species

European red ants deliver a painful sting rather than a bite. They possess a functional stinger at the end of their abdomen, which injects venom containing formic acid into the skin. This causes localised burning, itching, and mild swelling, similar to a mild nettle sting.

The sudden appearance of flying ants in summer is part of their natural mating ritual, known as the nuptial flight. When weather conditions are warm and humid, young winged queens and males leave the nest simultaneously to mate in mid-air. Once mated, the males die, and the queens shed their wings to find a site for a new nest.

Pharaoh ants are difficult to eliminate because their colonies contain multiple queens and use a survival strategy called "budding." If a Pharaoh ant nest is sprayed with standard insecticide, the colony senses danger and splits into several smaller colonies that scatter to different areas of the building, vastly escalating the infestation. Professional baiting programmes are required to eliminate them safely.

The Black Garden Ant (Lasius niger) is by far the most common ant species found across Ireland. While they build their primary nests outdoors beneath lawns, garden stones, and paving slabs, worker ants frequently enter homes, kitchens, and commercial properties during spring and summer to search for food.

No, there are no dangerously poisonous or venomous ants native to Ireland that pose a threat to human life. However, the European Red Ant (Myrmica rubra) possesses a functional stinger and can deliver a painful sting that injects mild formic acid, causing temporary burning, itching, and red swelling similar to a nettle sting.

Irish ants are opportunistic omnivores that feed on a wide variety of organic substances depending on their species. In nature, their primary diet consists of sweet honeydew secreted by aphids, dead insects, seeds, and plant sap. When they forage inside Irish homes, they are particularly drawn to sugary foods, spilled fruit juice, pet food, meat scraps, and grease.

The Pharaoh Ant (Monomorium pharaonis) is widely recognised as the hardest ant species to eliminate in Ireland. Because they nest deep inside wall cavities and heated pipework, spraying them with standard household insecticides causes the colony to undergo "budding"—a survival reaction where the colony splits into multiple sub-colonies and scatters throughout the building. Successfully eradicating Pharaoh ants requires a specialised, professional baiting programme.