Which of the following is incorrect regarding German cockroaches?

German cockroaches have a characteristic appearance that includes a distinct coloration. They are not known for having a solid body color; instead, they typically exhibit a brownish-tan coloration with two noticeable dark stripes running parallel along the length of their thorax. This identification feature makes it clear that the claim of having a solid body color is inaccurate, as their coloring and markings are what distinguish them from other cockroach species.

Moreover, the other options highlight well-known facts about German cockroaches. They are indeed the most common type of pest cockroach found in residential settings, primarily due to their ability to reproduce quickly and adapt to human environments. Additionally, German cockroaches thrive in warm conditions, which further contributes to their habit of infesting homes, as they prefer temperatures that are comfortable for humans. Understanding these characteristics helps in effectively identifying and managing these pests.