What is a physical evidence of a rodent infestation?

Gnaw marks are a clear and identifiable sign of a rodent infestation. Rodents, such as rats and mice, have continually growing incisors that they need to wear down. As a result, they gnaw on various materials, including wood, plastic, and even wiring. The presence of these gnaw marks indicates not only the activity of rodents but also hints at areas where they may be entering a structure or searching for food. This physical evidence is critical for pest control professionals as it helps in confirming the presence of rodents and in planning an effective management strategy.

Other options, while potentially related to pest issues, do not serve as direct evidence of a rodent infestation. Pest control products may be present for a variety of reasons, including preventive measures against different pests. Scratched walls could indicate various issues, including damage caused by pets or wear and tear, not necessarily related to rodents specifically. Stray cat sightings may suggest the presence of other wildlife, but do not provide tangible evidence of rodents themselves.