What Makes A Good Squirrel Proof Bird Feeder?

A good squirrel proof birdfeeder does not harm the squirrel, but rather works with a wire mesh and hopper system that instead denies them the tasty treats. Whereas the squirrel is dumped to the ground in a heap, the birds simply fly to the feeder, perch where they wish, and eat their fill. Squirrels have nothing to balance on, and nothing to stand on, and tumble to the ground without robbing the birds.No health risks or danger is posed by a squirrel proof feeder, since the bird can easily perch. They are sometimes better feeders overall anyway, since many birds can actually see the birdseed much easier in this manner. Still wondering if you really should purchase or build a squirrel proof feeder?