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.

Many different types of animals like to build nests in attics. The types may vary depending on your home’s condition and location and you can prevent them by sealing off entry points and eliminating food sources. The most common critters that like to build nests in your attic include:

• Raccoons

• Bats

• Squirrels

• Mice

• Rats

You’ll want to call a licensed and insured wildlife removal company that offers:

• Full property inspection—indoor and outdoor

• Proper animal identification

• Written management plan with follow-up visits included

• Humane removal techniques

• Preventative exclusion measures

If it’s an emergency and you can’t wait, you’ll need to contact an emergency animal control company near you.

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