Location of Strečno mountain pass in European context and a close-up of the collection site on a historic map from 1955.

 
 
  Part of: Štefánik M, Fedor P (2020) Environmental stress in Parnassius apollo reflected through wing geometric morphometrics in a historical collection with a possible connection to habitat degradation. Nature Conservation 38: 79-99. https://doi.org/10.3897/natureconservation.38.48682