They Invented What? (No. 33)

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U.S. Pat. No. 4,656,770:  Bird repelling means.

 

Abstract: 

This invention is a combination of visual and aural devices to create panic in selected bird species. This is accomplished in part through a body simulating a Tiger Cat which is weathervane mounted. The body includes bright orange stripes and has predatory eyes. Streamers depicting paniced birds are attached to the tiger’s tail and an internal wind driven flute produces a variety of the noises. Additionally, reflectors are used on a propeller to simulate light reflection from a gun barrel. Further, random or scheduled explosions from an automatic acetylene exploder and bird warning and distress calls are broadcast over loud speakers for the species of birds being repelled.
 

Claims:

1. A bird repelling means comprising: predator simulating means; a wind driven flute mounted within said predator simulating means; means for mechanically altering the tone of said wind driven flute…

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