What distinguishing feature is common to adult Oriental cockroaches?

Adult Oriental cockroaches are characterized by short wings in males, which is a notable feature that helps in their identification. While the females of the species are wingless, the males possess wings that are not long enough to allow for effective flight and instead serve more for protection of their bodies.

The body shape of Oriental cockroaches is generally broader and more robust compared to other species, which is why a long, slender body does not apply. Additionally, these cockroaches are typically a dark brown to black color and do not exhibit bright colored patterns, making the choice regarding light grey color and bright patterns irrelevant. The distinction of short wings in males is thus a clear and significant feature in identifying this specific cockroach species.