The fact is bats are actually quite harmless and are important indicators of a healthy environment. Because they are sensitive to high pollution and pesticide levels, they are useful as a warning sign to potential environmental problems.
Bats can be important weapons in combating insects that are actually dangerous to humans. A small bat can capture more than 1200 mosquitoes. The effectiveness of bats in some areas diminishes the need for pesticides that can harm both the pests and their natural predators. One of the most effective and environmentally friendly ways to reduce the mosquito population near you home is to install a bat roosting box.