![]() Pupae and young larvae are sometimes moved away from colonies to set up new ones and so pharaoh's ants spread through buildings. Pharaoh's ants are usually associated with central heating systems, ovens or heat exchangers as they need a minimum temperature of 18✬ to breed with an optimum of around 30✬. These hatch into larvae or grubs in 1-2 weeks, are fed by sterile female workers and reach pupal and then adult stage after about eight weeks. Each colony will have several queens which lay eggs. Pharaoh's ants live in large colonies with nests found with up to 50,000 worker ants and 100,000 young stages. It is only found indoors and in particular hospitals, prisons and large urban housing blocks. ![]() It has been found throughout Britain in buildings that are warm enough (above 18✬). This is an ant species that was first found in Britain early in the 19th Century, probably originating in North Africa.
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