Rodent inspections often indicate the presence of rodents by identifying what type of marks?

Rodent inspections frequently reveal the presence of these pests through the identification of rub marks. These marks are made when rodents navigate through an area and brush against surfaces, leaving behind traces of their fur and oils from their skin. This evidence is particularly valuable because it indicates not only the presence of rodents but can also suggest their travel routes and potential nesting or hiding places.

The visibility of rub marks can be heightened in areas where rodents frequently pass, such as along walls or structural supports. Such marks provide a more consistent and reliable indication of rodent activity compared to other signs like footprints, which may not always be evident, or digging marks and nesting marks, which could be less frequently observed depending on the environment. Thus, the emphasis on rub marks in inspections highlights their importance in understanding rodent behavior and effectively managing infestations.