Strepsiptera (twisted wing parasites) are easily distinguished by what feature?

• A. Unique shape of wings
• B. Aquatic larvae
• C. Very large eyes
• D. Bright metallic color

Answer: (A)

The key trait to notice is the wings. Strepsiptera are named for their twisted-wing appearance—the males have two pairs of wings that are uniquely contorted and held in a distinctive way that sets them apart from other insects. This dramatic wing morphology is the easiest visual cue for identifying members of this order, making it the most reliable distinguishing feature. The other options don’t reflect what these insects look like in typical adult form: they do not have aquatic larvae, extremely large eyes, or bright metallic coloring as defining traits. In fact, many Strepsiptera adults have tiny or hidden wings (or are wingless in females), so the wing twist in the males remains the standout characteristic.