Avian Anerometer

Twelve stainless steel cups attached vertically to The ends of radial rods catch the wind.  The rods are stepped on the central axle so that each of the end cups is higher than the cup preceding.  The cups rotate in a screw-like plane.  Also at the end of the radial rods are another twelve Stainless cups.  These carry birdseeds.  Wind on the cups causes rotation of the Machine.  Action/reaction of the birds taking off and landing also promotes rotation.  A merry-go-round of shameless birds.