What is a common sign of a rat infestation?

The presence of rub marks on surfaces is a common sign of a rat infestation because rats have oily fur that can leave smudges or marks on areas they frequently traverse. These rub marks are often found along walls, baseboards, and other surfaces that rats use as pathways. The marks can suggest the rats' activity level and can help identify their routes, which is crucial for effective pest control.

In contrast, empty food packages may indicate that rats have been feeding, but they do not specifically signal the presence of a rat infestation on their own. A strong floral scent is not typically associated with rats and could point to other issues, such as the presence of certain plants or cleaning products. Noisy behavior at night might occur due to rats being nocturnal, but it is less definitive as a sign of infestation compared to visible rub marks. Observing rub marks can provide more reliable information about the extent and location of the infestation, making it a more effective indicator for pest management.