Pharaoh ant (Monomorium pharaonis)
The female workers are only 1.5-2.5 mm long, amber yellow with dark-tipped abdomen. Pharaoh ant colonies normally have several queens. This species is very thermophilic and is found only in well-heated buildings, above all hospitals, bakeries, commercial kitchens, indoor pools, etc. The hidden nests and establishment of branch nests in masonry make control very difficult.
Besides sweet foods, pharaoh ants eat mainly material that contains protein such as meat, eggs, cheese and blood. They transmit diseases, and are otherwise a nuisance, mainly in hospitals. Thanks to their small size, they are able to get into medical equipment, sterile packages and wound bandages.back