Insectivorous bats consume large numbers of agricultural pests, which cost farmers and foresters billions of dollars yearly. Bats play an important role in sustaining many unique and fragile cave ecosystems. For example, bats are the primary source of nutrients in many cave systems, and many cave-obligate species depend on such input for survival. Thus, the loss or significant reduction of bat populations from caves could have cascading effects that impact the status of many other cave species.
Of the eight species recorded in Wisconsin, the four cave-dwelling bats are listed as threatened - Big Brown, Little Brown, Northern Long-eared, Eastern Pipistrelle -- while four others are on our "watch" list. There are many volunteer opportunities available to the public. Watch a video and learn how you can build your own bat house.
You can donate directly to the Wisconsin Bat Conservation Society, an annual membership where groups and citizens can support bat projects in need of immediate funding. These funds will be used for white-nose syndrome WNS research, landowner support in WNS prevention and control, surveillance, inventory, monitoring, applied management and education about the benefits of bats.
Saving Wisconsin's bats. Acoustic Monitoring Roost Monitoring. Bats in Wisconsin Wisconsin has eight species of bats, all of which are insectivorous and use echolocation to navigate and capture prey. Little brown bat Big brown bat Northern long-eared bat Eastern pipistrelle. Silver-haired bat Hoary bat Eastern red bat Evening bat.
Riverine Impoundment - Reservoirs. Riverine Lake - Pond. Riverine Mud Flat. Small Lake--hard, bog. Small Lake--meromictic. Small Lake--other. Small Lake--soft, bog.
Spring Pond, Lake--Spring. Springs and Spring Runs Hard. Springs and Spring Runs Soft. Boreal Forest. Central Poor Fen. Coastal Plain Marsh. Emergent Marsh.
Floating-leaved Marsh. Mesic Cedar Forest. Northern Dry Mesic--late seral. Northern Hardwood Swamp. Northern Mesic Forest--late seral. Northern Mesic Forest--mid seral. Oak Opening. Oligotrophic Marsh. Patterned Peatland. In order to get the bats out, an eviction or exclusion should be completed as bats in Wisconsin are protected and it is illegal to kill them. Eviction involves installing one-way doors that allow the bats to leave but not re-enter the building.
One-way doors can be made of plastic or screening but must not cause harm to the bats. More information on conducting an exclusion yourself. There are many nuisance animal control operators in the state who will do bat exclusion for a fee if you cannot or don't wish to exclude the bats yourself. Also note that exclusions may not be completed June 1 through Aug. However, if the landowner deems the bats in the home are posing a health risk bats routinely entering living space, for example , the landowner may conduct the exclusion provided they fill out and submit the Health Exemption Form.
The landowner must complete and submit the form within five days of start of exclusion work. This is not an additional permit, and no response from bat program staff is required once the form is submitted. Save it to your desktop by right-clicking the link and then choosing "Save target as You can also try opening the form in a different browser, like Internet Explorer.
Bats occasionally find their way into living spaces, especially in late summer as bats born in June learn to fly and find their way into odd situations.
Bats do not want to be flying around inside your home. The safest course of action is to close the bat in a room with a window or door to the outside. Leave the door or window open and allow the bat to leave on its own. If the bat does not leave on its own, wait until it tires and lands. Wearing gloves, use a cardboard or plastic box to cover the bat. Gently slide a piece of paper or cardboard behind the bat and enclose the bat inside the container.
Take the container and bat outside and place the container on its side at the base of a shrub or other protected area. Allow the bat to leave on its own. Never throw a bat into the air to encourage it to take flight.
Removing a bat from your house. If you believe a possible bat-human or bat-pet interaction has occurred, please visit this CDC webpage — Coming in contact with bats. Bats leave their day roost each night in the summer to forage for insects. After feeding for several hours, they use warm, protected areas to rest and digest for some time before foraging again.
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