The magnetic compass mechanisms of birds and rodents are based on different physical principles.

@article{Thalau2006TheMC,
  title={The magnetic compass mechanisms of birds and rodents are based on different physical principles.},
  author={Peter Thalau and Thorsten Ritz and Hynek Burda and Regina E. Wegner and Roswitha Wiltschko},
  journal={Journal of the Royal Society, Interface},
  year={2006},
  volume={3 9},
  pages={583-7}
}
Recently, oscillating magnetic fields in the MHz-range were introduced as a useful diagnostic tool to identify the mechanism underlying magnetoreception. The effect of very weak high-frequency fields on the orientation of migratory birds indicates that the avian magnetic compass is based on a radical pair mechanism. To analyse the nature of the magnetic compass of mammals, we tested rodents, Ansell's mole-rats, using their tendency to build their nests in the southern part of the arena as a… CONTINUE READING
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