Birds Build Nests in the Eaves
Birds look for high, sheltered places to build their nests. Unfortunately, roofs and eaves offer the perfect place to lay a few eggs. Small birds such as starlings and sparrows can fit into tight spaces that you may not have considered. For example, if you have a hole in your roof, they can enter the attic or the internal structure of your home. Once you have birds in your walls, you'll need professional help to get them out. While nesting is instinctive, and you may feel bad about evicting innocent birds, keeping your home bird-free is best for everyone. Some birds carry diseases that are dangerous to humans, and piles of droppings are no fun to clean up.
Rodents Hide in Small Spaces
Homeowners have several rodents to contend with:- Squirrels
- Mice
- Rats

Raccoons Make Their Home in Attics
Raccoons are nocturnal and prefer dark areas, so they're most likely to settle in the following:- Chimneys
- Basements
- Attics

Bats Prefer Dark Areas
Bats don't make a lot of fuss, but once they've settled into your home, their feces, called guano, can cause major problems. Depending on where bats nest, their guano can contaminate water, and eat through insulation or stain walls. Bats also gather in colonies, so if you see a few bats around the house, there are probably a lot more hidden in your walls, attic or garage. Despite the pop culture tie to vampires, the one thing you don't have to worry about with a bat infestation is waking up with fang marks. For one, vampire bats make up a very small percentage of the population, and all of them are located in South and Central America. For another, vampire bats generally feed on sleeping livestock. If you encounter a bat near your residence, it most likely consumes fruit or bugs.