What feature differentiates commensal rodents from native rodents?

The correct answer focuses on tail length as a distinguishing feature of commensal rodents compared to native rodents. Commensal rodents, such as house mice and roof rats, typically have longer and more exposed tails relative to their body size compared to many native rodent species, which often have shorter tails that may be bushier or hidden under fur. This physical trait can help in identifying them, as tail length is a notable characteristic for classification within rodent taxonomy and behavior.

Understanding this distinction is important for pest management, as it can aid in identifying and controlling commensal rodent populations that might invade human habitats. Recognizing the specific species based on tail length can also inform strategies for prevention and eradication methods.