What color is an adult German cockroach?

An adult German cockroach typically exhibits a light brown to tan coloration, complemented by distinct dark bars running along its back. This specific coloring and pattern make it easy to identify the German cockroach compared to other species. The coloration serves as camouflage in its natural environment, which helps it avoid predators.

The other options do not accurately describe the adult German cockroach; for instance, dark brown with yellow stripes and black with orange markings correspond to different cockroach species. Chestnut brown with white spots inaccurately portrays the cockroach's typical appearance, as they rarely exhibit such distinctive markings. Understanding the correct identification of pest species, such as the German cockroach, is crucial for effective pest control management and strategy formulation.