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Table A4.

Testing for the physical principle underlying the chickens' magnetic compass: choices of chicks whose upper beak was locally anesthetized with xylocaine

Magnetic North = geographic East
Without treatment
With local anesthesia
BirdSexTraining directionChoices%Choices%
   47 ♂ e S N N S 80 S N eN w 60 
   46 ♂ E E W E E 100 s E W E W 80 
   45 ♀ W E n E n 60 E E E n s 60 
   50 ♀ W W E E W 100 W s E s W 60 
   53 ♂ s E E W s 60 E E W W W 100 
   54 ♀ N N S w e 60 e N w S N 60 
   49 ♀ S S S e S 80 N N S N N 100 
   56a ♂ S S S N w 80 w N S N N 80 
N=8    Mean = 78%  Mean = 75% 
Magnetic North = geographic East
Without treatment
With local anesthesia
BirdSexTraining directionChoices%Choices%
   47 ♂ e S N N S 80 S N eN w 60 
   46 ♂ E E W E E 100 s E W E W 80 
   45 ♀ W E n E n 60 E E E n s 60 
   50 ♀ W W E E W 100 W s E s W 60 
   53 ♂ s E E W s 60 E E W W W 100 
   54 ♀ N N S w e 60 e N w S N 60 
   49 ♀ S S S e S 80 N N S N N 100 
   56a ♂ S S S N w 80 w N S N N 80 
N=8    Mean = 78%  Mean = 75% 

For explanations, see Table A1 

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