This is an example of animal exclusion:

This is an example of a squirrel entry point:

This is an example of a one-way device that lets animals in but not out:

Poor drainage allows water to seep back into the structure:

No screens on vents allows bird entry:

Wood-destroying insects hide behind siding:

Example of a hornets' nest in a tree:

Entry points for mice in-between air conditioning units:

Animal footprints leading to a den: