EurekAlert!: A magnetometer in the upper beak of birds?
”More than about 500 dendrites in the periphery encode the magnetic field information, which is composed in the central nervous system to a magnetic map. It obviously does not matter, whether birds use this magnetic map for their long distance orientation or do not — the equipment can be found in migratory birds, like robin and garden warbler, and well as in domestic chicken.” Now I wonder why we have the old saying, “follow your nose” ...
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