Visual Inspection   First, experts will look for cracks and crevices where pests can enter and for evidence of nesting or feeding. They will also check for structural damage that could provide access for unwanted visitors and droppings left behind by them.   Throughout Check   The inspectors will check all of the property’s nooks and crannies. For example, they will look behind appliances, in attics, under porches, and even use special equipment to pick up the sound of rodents and insects. Sometimes, they can also take samples of droppings or nests found and send them to a lab for analysis.