Which ant species is known as the smallest found in buildings?

The Thief ant is recognized as the smallest ant species commonly found in buildings. These ants are typically around 1/16 to 1/8 inch long, which makes them notably smaller than many other ants that might inhabit structures. Thief ants often have a yellow or light brown coloration and are characterized by their very small eyes and petiole, which has a single node making them distinguishable from other ant species.

Due to their size and ability to nest in various locations, including wall voids, they are often overlooked during inspections. Their preference for nesting in warm environments close to their food sources, which may include grease, oil, and protein, leads them to be frequently encountered in residential buildings. Understanding such characteristics aids in identifying and implementing appropriate pest control measures when dealing with ant infestations.