The same thing applies to Flying squirrels as it does for chipmunks – with the exception they can jump (or fly) much longer distances to gain access to a bird feeder.
There is no such thing as a flying squirrel proof bird feeder, when manufacturers refer to squirrel proof they are referring to the number one trouble maker with birds feeders, grey squirrels.
Flying squirrels are like a large mouse – a lot of their size is perceived because of the skin folds they use to fly. Their small mouse-like size allows them to crawl through the smallest openings.
