Pharaoh Ants nest in dark voids inside or around structures. Usual nest locations are wall voids, behind molding, in insulation in refrigerators, in cardboard, between sheets of paper and in soil of potted plants. Electric outlets and switch plates are excellent areas for Pharaoh ant nests. Pharaoh ant colonies have many queens. The workers are small yellow ants that follow trails from their nest to food. The best control is obtained with Pharaoh ant baits.