What is a common sign of rodent infestation?

A common sign of rodent infestation includes the presence of droppings and gnaw marks. Rodent droppings are typically small, dark, and sometimes resemble grains of rice or pellets, depending on the species. They can be found in areas where rodents frequent, such as near food sources or along their travel paths.

Gnaw marks, on the other hand, indicate that rodents are actively feeding or nesting in an area. These marks can often be seen on food packaging, furniture, and building materials, indicating that the pests are trying to access food or create nesting sites. Recognizing these signs is crucial for addressing an infestation promptly and preventing further problems.

Other options, such as high levels of dust or food left out in the open, may not specifically signify a rodent issue. While food being left out could attract rodents, it is not an indicator of an existing infestation. Similarly, increased fly populations can indicate various sanitation problems but are not directly linked to rodent presence. Hence, identifying droppings and gnaw marks is a definitive way to ascertain a rodent issue.