Area of house between foundation and sill plate where bats were entering.
Soffit installed incorrectly creating large gaps that bats can enter.
Most common area seen as point of entry. Reroofing houses can commonly cause soofits to be bent open as this one was. Or soffits not cut and installed tight enough is another issue seen.
Attic venting as this one is installed correctly, but is manufactured in such a way that bats can make there way through grated venting seen here. Removing is not necessary, AllState Bat Control can fix this issue.
Decorative Roof Tops
Cedar shakes and decorative roof tops such as this are pretty, but can lend to attracting bats. Especially if roof tops have working venting units. Screening can deteriorate over time.
Venting such as this is very common but does not come with screening in unit. Bats are easily able to enter attic areas. No need to remove/replace, AllState Bat Contol can put screening in after the fact to help you gain back you peace of mind.