Which of the following is NOT a sign of rodent activity?

Water stains are typically not a direct indicator of rodent activity. Instead, they often suggest moisture issues or leaks, which can attract rodents but are not evidence of their presence. The other signs are more directly associated with rodent infestations.

Fecal droppings indicate where rodents have been feeding or nesting, providing clear evidence of their activity. Gnaw marks demonstrate that rodents are chewing on materials for food or nesting, a common behavior among species like rats and mice. Similarly, a urine smell can be a strong indicator of rodent presence, as urine is often left behind and has a distinct odor that can be detected even in low concentrations.

Recognizing these specific signs of rodent activity versus indicators of other issues is crucial in pest management, particularly for targeted control measures. Understanding these distinctions helps technicians effectively assess and respond to rodent infestations in various environments.