A JAPANESE company has developed a device to discourage pigeons
from perching on statues, temples
and other buildings and control the
menace of pigeon droppings. Called a
"bird stopper", the device works on a
recent discovery that the homing
characteristics of pigeons are
influenced by the earth's magnetic
field (New Technology Japan, Vol 2 1, No 9).
Pigeons have magnetic iron oxide, known to the ancient Greeks as lodestone, in their heads, which works like a biological magnet. The device produces a magnetic field that confuses the pigeons and keeps them away without harming them, the Japanese scientists say.
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