While often called brown or black rats, these pests can range in color from white to black. There are several more reliable ways to identify them: The body of a Norway rat is large and stocky, while that of a roof rat is small and sleek. Only roof rats have tails that are longer than their head and body combined. Norway rats have a blunt muzzle, whereas roof rats have pointed noses. Roof rats’ eyes and ears are comparatively large. While both pests like to breed and feed indoors, the exact location of this activity is a major difference between a Norway and a roof rat. Norway rats tend to nest on the first floor or in basements. However, they can thrive anywhere people do. Conversely, roof rats are great climbers and can use their long tails for balance and quick movement. As such, they prefer nesting off the ground, often using trees to enter buildings. Once inside, they may settle in attics, walls, cabinets, and roofs.