Bats are best controlled by:

Controlling bats effectively primarily involves preventing them from entering or residing in structures, which is why closing openings in structures where they may roost is the most effective strategy. Bats can squeeze through very small openings, so identifying and sealing these gaps not only prevents access but also helps manage potential health risks associated with bat droppings and the spread of diseases.

This method also addresses the root of the problem by ensuring bats do not have a place to roost. Once access points are secured, the likelihood of encountering bats inside the structure is minimized. Other methods like trapping and releasing may not be as effective because they do not prevent bats from returning. Ultrasonic repellents and decoy setups lack strong evidence of effectiveness in deterring bats and may not provide a long-term solution. Thus, sealing entry points remains the most reliable and comprehensive approach to controlling bat populations in and around human structures.