This depends on if their needs are being met. They'll likely return night after night if they have access to food, water, and adequate shelter. If this changes, they’ll look for another roosting spot. This is why bright lights and other dissuading factors often work when removing bats from a property.

You can find a variety of humane bird repellent sprays online and at home improvement stores. However, if you want to try a DIY method that will keep birds away without harming them, mix some water, dish soap, and a few drops of peppermint oil and spray the area you want bird-free. Peppermint oil is a notoriously lovely smell for humans, but birds tend to avoid it.

Finding a dead bat in your home can be frightening, even during spooky season. The United States Department of Interior states that if you find a dead bat, take these steps:

• Contact your state wildlife agency to report the finding

• Photograph the bat safely to help the wildlife agency determine the species

• Use disposable gloves to place the bat into a plastic bag, making sure to spray with disinfectant and close the bag securely 

• Thoroughly clean your hands and any clothing that came into contact with the bat

If you see one dead bat, you might have a large bat infestation that needs to be treated immediately. Call a local pest control company to properly inspect your home for other bats.

While not common, bird’s nests can cause problems to your property in some cases. 

• Block vents for your dryer, stove, and fans, creating a fire hazard

• Clog gutters and drains, leading to roof and siding damage

• Damage solar panels

• Wiring issues if the nest is on or near a light fixture