High-frequency bird repellent devices are effective at driving away birds, which is their intended purpose. However, these devices also tend to have unintended negative consequences. For example, if you or your neighbors own pets, the high-pitched noise emitted by these electronic devices will cause them distress and may even make them aggressive.

To keep animals out, you must prevent them from entering. As long as they can get in, the problem will persist. That said, consider making your attic less inviting using deterrents like motion-activated lights or ultrasonic devices. Additionally, keeping a well-maintained, clean, and uncluttered attic that you regularly inspect for activity may make the space less attractive to critters.

If you’ve had a prior bat infestation or simply want to avoid having bats invade your home in the first place, there are a few steps you can take without the need for a pro. 

• Seal entry points, such as where your chimney meets your house, or other gaps or holes exist.

• Use bat deterrents like bright lights or ultrasonic devices to force them away from your home. 

• Reduce bat attractions like standing water and bird nectar feeders inviting bats into your yard.

Trees that provide a habitat to bats and an abundance of bugs—their main food source—will attract bats to your yard. Because the North American landscape has changed so much in recent years, bats have a harder time finding trees with cavities to shelter in. If your yard has a dead or dying tree with a lot of sun exposure, bats will likely be drawn to it because trees with those features are less common.