Droll Yankee Flipper

Droll Yankees YF flipper bird feeder 4.8 Stars
Price ($89 – $110

If you are battling squirrels this feeder may be the answer
Squirrel-proof wild bird feeder holds approximately 5 pounds of seed
Sturdy polycarbonate feeding chamber; metal cap and base resists squirrel damage
Battery charger plugs into standard 120 volt wall outlets
Rechargeable nickel-cadmium power-stick battery and battery charger included
Measures 4-3/4 by 21 inches; lifetime feeder warranty; 1-year warranty on motor and battery charger
Size: 4.8 x 4.8 x 21 inches ; 5 pounds
Strong polycarbonate feeding chamber is 4-3/4 inches in diameter and 21 inches long
Four feeding chambers easily accessible via the perch ring
Charge the batteries overnight when you buy it in a standard 120 volt wall outlet
stainless steel wire hanger will not rust.
Lifetime guarantee.
And have you considered catching one of these raiders and attaching a GPS Tracking Device so you can track them around your property. Figure out where they nest and put squirrel food there for them. Hopefully that will keep them away from your bird feeders.

Red squirrel is light enough to not trigger the mechanism
Grey squirrels are almost always ejected but some have learned to stay on while the Flipper spins and he can exhaust the battery
OK. So it’s not perfect, but the entertainment watching the squirrels is worth the money.

See this youtube video: http://youtu.be/2TWDSZu7Tbw