Bats provide real ecological benefit by consuming large numbers of insects each night, but a colony roosting in an attic or wall void can leave behind accumulating droppings that pose a respiratory health concern and an unpleasant odour. They typically enter through small gaps at rooflines, soffits, and vents.
Because several bat species are protected and colonies often include young that cannot yet fly, exclusion must be timed carefully to avoid trapping animals inside, and often follows a specific seasonal window. A wildlife control professional can identify active entry points and install one-way exclusion devices at the right time of year.