Which feature is used to identify Australian cockroaches?

• A. Dark markings on thorax
• B. Light markings on wings
• C. Long wings covering body
• D. No markings

Answer: (B)

The key clue for identifying the Australian cockroach is the light markings on its wings. Those pale markings stand out against the dark brown body and are a distinctive feature that helps differentiate it from other common roaches. Other options aren’t as reliable: dark markings on the thorax point to different species, wings that simply cover the body aren’t unique to this species, and no markings wouldn’t match the typical wing pattern you’d expect for the Australian roach. So the presence of light markings on the wings is the most useful identifying trait.