Original Paper

Journal of Comparative Physiology A

, Volume 197, Issue 6, pp 677-682

First online:

No alignment of cattle along geomagnetic field lines found

  • J. HertAffiliated withDepartment of Anatomy, Faculty of Medicine, Charles University
  • , L. JelinekAffiliated withDepartment of Electromagnetic Field, Faculty of Electrical Engineering, Czech Technical University in Prague Email author 
  • , L. PekarekAffiliated withNational Reference Laboratory for Electromagnetic Field, National Institute of Public Health
  • , A. PavlicekAffiliated withDepartment of System Analysis, Faculty of Informatics and Statistics, University of Economics

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This paper presents a study of the body orientation of domestic cattle on free pastures in several European states, based on the Google satellite photographs. In sum, 232 herds with 3,412 individuals were evaluated. Two independent groups participated in our study and came to the same conclusion that in contradiction to the recent findings of other researchers, no alignment of the animals and of their herds along geomagnetic field lines could be found. Several possible reasons for this discrepancy should be taken into consideration: poor quality of Google satellite photographs, difficulties in determining the body axis, selection of herds or animals within herds, lack of blinding in the evaluation, possible subconscious bias, and, most importantly, high sensitivity of the calculated main directions of the Rayleigh vectors to some kind of bias or to some overlooked or ignored confounder. This factor could easily have led to an unsubstantiated positive conclusion about the existence of magnetoreception.


Magnetoreception Magnetic alignment Cattle in magnetic field Magnetic sense Statistical evaluation