Summary
In experiments performed in Italy, altered magnetic fields were effective in biasing the initial orientation of Italian pigeons but not that of German pigeons raised in Italy, suggesting a genetic difference between the two bird stocks.
References
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We are grateful to Dr H. G. Wallraff who kindly supplied the German pigeons used in our experiments and gave useful suggestions.
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Benvenuti, S., Ioalé, P. Initial orientation of homing pigeons: different sensitivity to altered magnetic fields in birds of different countries. Experientia 44, 358–359 (1988). https://doi.org/10.1007/BF01961284
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DOI: https://doi.org/10.1007/BF01961284