No single deterrent will work 100 percent of the time, so we suggest combining deterrents to ensure your seed has the best possible chance to grow. Using bird netting over your seed, with physical deterrents like mylar tape coupled with hanging bird feeders at the edges of your growing area—and removing any bird’s nests, if possible—will give your seeds the best possible chance for success.

DIY animal removal is rarely a good idea and is not advised for many reasons. First, these types of animals can carry diseases and, therefore, pose a health risk to you, your family, and your pets if mishandled. Second, depending on your city or municipality, it may be illegal to remove or handle wildlife yourself. 

Sealing your home against these animals yourself is also a bad idea. Trapping an animal under your house will cause odor and insect problems when it passes away. 

Both spikes and loose nets can be installed over nest sites to prevent the bird from returning, but nets are not a humane option since birds and other wildlife can get tangled in them. 

Spikes are a humane alternative that deter nesting without harming the birds. In small areas, like vents, a very fine mesh net can be installed to prevent the bird from returning. These nets don't generally pose a risk to the birds.

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.