Identification Flying squirrels frequently set up nests in woodpecker holes, abandoned homes of other animals, and nest boxes. Adults use leaves, moss, lichen, feathers, and shredded bark to build their nests. They are normally situated 8 to 20 feet above the ground and have tiny entrances roughly 1.5 to 2 inches wide. Flying squirrel nests are problematic when they are close to homes. Since the pests move around a lot, they often infest attics. Inside, they chew through wires, damage personal property, and are very noisy. Prevention & Removal Cutting back tree branches that hang over roofs, replacing broken window screens, inspecting and capping chimneys, and covering vents are all preventative measures homeowners can employ to deter flying squirrels. However, at the first sign of infestation in or near attics, individuals should contact professional wildlife control. The experts at Critter Control not only remove flying squirrels and their nests, they also offer tips on preventing future problems.