Bats in Your Home Bats in Your Home Seven species of bats live in Minnesota. All are small and feed exclusively on insects. Although bats have notoriously poor eyesight, they are excellent hunters and navigators. Bats use a sophisticated sound system, giving them a ready ability to distinguish their insect prey from larger objects, like people. While most adult females produce only a single newborn each year, the litters of some species can range up to four.
Young bats grow rapidly and are able to fly within three weeks.
Bats may use the interiors of buildings as roost sites. Their natural squeaking, scratching and crawling sounds can cause a nuisance. Bats may also cause other problems. Droppings stain floor and walls and, in sufficient quantity, cause odor problems. Because they are mammals, bats can carry rabies but this danger is minor.