What is a distinguishing feature of the abdomen of the odorous house ant?

The abdomen of the odorous house ant is characterized by its unique shape, which allows it to overhang and conceal the petiole, the small segment that connects the thorax and abdomen. This feature is particularly distinguishing among ant species and aids in identifying the odorous house ant, contributing to its classification. The overhanging abdomen is not only a key physical attribute but also plays a role in behavior and movement, as it helps the ant in navigating through various environments.

In comparison, the other features mentioned in the options do not accurately describe the abdomen of the odorous house ant. The abdomen is not described as smooth and shiny, flat and inconspicuous, or orange in color, making them less representative of this species. Understanding the physical characteristics of the odorous house ant, such as the shape of the abdomen, is essential for effective identification and pest control strategies.