Screen various parts of the roof so that there are no crevices or openings where a bat can hide, or repair the roof or building to eliminate entrance holes. Sprays are not advised and can be much more dangerous than the presence of the bats. In the United States bats are beneficial members of the animal community. They help to control night-flying insects, in some instances pollinate flowers, and scatter the seeds of plants. Their guano is rich in nitrogen and has been sold as fertilizer.
Bats are valuable subjects for study.
Investigations in the field of echolocation try to determine how bats assess their environment and how this information is coordinated and acted upon. What we learn about bats may help us understand similar physiological processes in man.