Yes, bats can cause quite a bit of damage to the attic. Their weight and movement from flying around can damage insulation, and they can chew through wiring and the walls. As if this isn’t enough, they leave their droppings throughout, which carry harmful bacteria and is dangerous for humans to breathe in, not to mention the extremely foul-smelling odor.

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.

If a wild animal enters your yard, prioritize safety for yourself and the animal. Remember to avoid direct contact and always keep a safe distance. Contact local authorities or a wildlife rehabilitation center if the animal is hurt or in distress. Both sources should be able to guide you on how to proceed and send help if needed. Please wait for the animal to leave naturally for non-threatening situations, as many will. To deter future visits, implement measures like securing trash cans, sealing entry points, and removing potential food sources.

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.