What is the length range of a roof rat compared to a Norway rat?

The length range of a roof rat compared to a Norway rat highlights a significant difference in size between the two species. Norway rats are generally larger and heavier, with adult Norway rats typically measuring between 12 to 18 inches in length, including their tails. In contrast, roof rats are smaller, usually ranging from about 12 to 16 inches, with their tails being longer than their bodies, contributing to their overall appearance but not increasing their overall length in comparison to Norway rats. This size difference is a critical identification factor in pest control, allowing technicians to determine which species they are dealing with based on the observed physical characteristics. Understanding these measurements is essential for effective management and control strategies specific to each rat species.