What is the common color of the American roach?

The American roach, scientifically known as Periplaneta americana, is characterized by its reddish-brown coloration, which fits the description of a "redial brown." This color is a significant characteristic that can help in identifying the species among other roaches. The combination of a reddish hue with a slightly lighter or tawny appearance contributes to its recognition.

In addition to color, the American roach is also identifiable by its large size and long antennae, which complement its overall appearance. Being knowledgeable about the specific color can aid pest control operators in distinguishing between various roach species, which is crucial for effective management.

In contrast, the descriptions in other options do not accurately reflect the common color of the American roach. Bright red is too vivid and not representative of this species, while dark black and dark mahogany are not typical for its appearance, leading to potential misidentification.