numbering of the spots        
  choice A
  • red spots are large
  • possible red belt
  • possible red or white collar
  • spot No.6 is half-moon shaped and comes into contact with spot No.5
next step >>  
  choice B
  • white collar sometimes hardly defined
  • red spots are circled with a whitish border
  • usually no red belt, except in populations from the south of France
  • spot No.6 is narrow and does not come into contact with spot No.5
  choice C
  • bold white collar
  • bold red belt
  • all the red spots are small and surrounded by a thick white border
  • spot No.6 has no red scales and looks like a comb
  • very local species in the south of France