Flying Squirrel Noises Flying squirrels emit short, high-pitched chirps to communicate with one another. The pitch and length of these noises can be changed to indicate various moods and needs. Typically, the sounds are too high in frequency to be heard by human ears. However, when the pests are living in attics and wall voids, residents may actually pick up the bothersome sounds. Prevention & Removal When homeowners are able to hear flying squirrel sounds, there is an infestation present. Since the pests are nocturnal, they make the most noise overnight and may even keep residents awake. Individuals that suspect the presence of flying squirrels in their homes should contact Critter Control. Our specialists are experienced in removing infestations.