Bat infestations are sometimes mistaken as rodent issues. Many homeowners falsely think they have a rodent problem when they find droppings on their porch, patio, or driveway. However, bats commonly roost in soffits and roofs near these areas and will spread their guano as they come and go.  Other indications of a bat infestation are: Bats flying in through the ridge cap Entry and exit points contain oil streaks Urine is dripping down the walls Bat droppings are falling from the ceiling Accumulated bat guano and urine in the attic Squeaky, high-pitched sounds.  They are often misidentified with baby birds nesting somewhere above.