Homeowners should not allow flying squirrels to nest indoors because of the damage they can cause. Their destruction consists of gnawing on electrical wires and wooden beams, tearing through insulation, creating fire hazards with the placement of their nesting materials, and enlarging holes in home facades to gain entrance. Collections of their droppings and urine create strong, unpleasant odors. Flying squirrels can also carry typhus and are host to a number of parasites. Since they nest in groups and cause so many issues, it’s important to remove flying squirrels in the house as soon as possible.