German cockroaches have:

German cockroaches are identifiable by the distinct physical characteristic of having two dark stripes running vertically along their pronotum, which is the shield-like structure that covers the back of their head. These stripes can often be referred to as "racing stripes," and they contribute to the cockroach's general coloration which is light brown to tan. The presence of these two stripes is a key identifying feature and helps differentiate German cockroaches from other species, particularly as they share their habitat with various other cockroaches that may have different markings or colors. Understanding this characteristic is essential for effective pest identification and management in pest control practices.