Cage & Aviary Birds

Down the Decades: the 1930s

NEWS: THE LATEST ‘WIRELESS’ THEORY

N INTERESTING theory that migratory birds have a particular kind of wireless of their own is held by Carl Holzapfel, the German naturalist. He contends that by means of this “radio” system they plan the direction of their long flights. Migrant birds, he says, are able to generate electricity by the motion of their wings, and a certain fluid in their aural cavity enables them to receive wireless messages. Herr Holzapfel supports his theory by the fact (ascertained by experiment) that carrier pigeons released in the neighbourhood of wireless transmitters in action become confused and it is only when the transmitters stop sending that the birds are able to

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