What is the best method for estimating the number of mice infesting an area?

Using non-toxic tracking patches is considered the best method for estimating the number of mice infesting an area because these patches can provide direct evidence of mouse activity without posing harm to the animals. By placing these patches in areas where mice are suspected to travel, pest control professionals can track the presence and movement of mice. The patches can make it easier to determine the extent of the infestation based on how many patches are disturbed and the quantity of droppings or other signs found on or around them.

While counting droppings can give an approximate idea of the population, it is less reliable because it requires proper interpretation of the droppings’ conditions, which can vary greatly depending on time and environmental factors. Visual inspections during the day may miss active mice, as they are primarily nocturnal, making this approach less effective for understanding the population in real time. Listening for sounds at night can provide auditory evidence of mice but does not yield a concrete estimate of their numbers and may not accurately reflect their presence in the area.

Thus, the utilization of non-toxic tracking patches provides a comprehensive and effective visual representation of the infestation level, making it the best method among the options provided.