Why Solve Bird Problems? Damage Caused by Pest Birds Most people fail to realize that bird droppings and nests are not only an annoyance, they also damage buildings, machinery, paint finishes and even neon signs. Diseases Carried by Pest Birds Birds and their droppings can spread more than 60 serious diseases to humans and pets. Learn more about whether you should be worried or not. How to Clean a Bird Site There's more to a proper clean-up than just hitting it with a hose. Learn all there is to know about sanitizing your site.