Thief Ants are tiny-only about 1/16th of an inch, and are a pale brownish color. Their size makes it easy for them to get into houses in search of food and water. They love meats, cheeses, and grease-foods that are rich in fats or proteins. They will also eat dead insects. The nests are in galleries in dirt, and they often build near another ant colony-raiding it to steal food. This is how they got their name! The Thief Ant will also build inside houses-in walls, cupboards, cracks and crevices. They can host diseases and tapeworms as an additional problem for human food. A colony may contain from a few hundred to a few thousand ants.