Bats are the only mammals naturally capable of true and sustained flight. The Little Brown Bat is one of the most common of the 12 bat species that are found in Illinois. It lives throughout the state during the summer and is the most abundant bat found hibernating In Illinois caves and mines during the winter. Little brown bats have glossy brown fur and wingspans of 9 to 11 inches. These bats may live as long as 30 years. Little Brown Bats are strictly insectivorous and consume large amounts of flying insects. They hunt these animals on the wing by echolocation. Little Brown Bats use sound waves to perceive their prey. During the summer female little brown bats form maternity colonies. A colony typically consists of a few hundred female bats, but may include several thousand individuals. Maternity bat colonies roost in the attics of buildings. Each female bat gives birth to a single pup, usually in June. Young brown bats can fly as early as 3 weeks of age. While female little brown bats gather in maternity colonies, male little brown bats roost separately, either singly or in small bachelor colonies.


Big Brown Bats are another commonly found bat in Illinois. Big Brown Bats are considered large for a bat. Their average weight is 0.5 to 1.2 oz. The wing span of a big brown bat is 12 to 16 inches.


Perhaps the greatest health risk from bats is rabies. Rabies is a viral disease causing encephalitis (inflammation of the brain) in humans and animals. Humans can become infected when bitten by a rabid bat. Transmission also can occur when an infected bat’s saliva comes in contact with a person’s eye, nose,mouth, a scratch or wound. Rabid bats may exhibit no obvious abnormalities, so all contact with bats should be avoided. People should not be allowed to occupy a room in which bats are found, until it is certain that no bats remain in the room. Histoplasmosis is a disease associated with bat guano and bird droppings. When droppings accumulate, a fungus can grow and produce spores that can cause histoplamosis when inhaled. Where bat droppings accumulate in attics, care should be taken to avoid contracting the disease.


Popular home remedies for eliminating bats are temporary, ineffective, and/or illegal.


Nuisance Wildlife Control employs multiple non-lethal methods to legally and permanently rid your home or building of bats. We are also capable of safe bat guano removal from attics walls and floors. This includes safely removing all guano, all soiled insulation, and complete deodorizing and disinfecting of affected areas. Check with your insurance carrier about coverage for bat guano remediation. Insurance companies typically do not cover rodent, bird, vermin damage, however bats do not fall into any of these categories.