Parnassius apollo

The butterfly Parnassius apollo L. or also called glacialis Parnassius, belonging to the family Papilionidae, was quite common in Europe in the 19th century. However, its distribution and population size declined sharply during the 20th century, so nowadays it is a threatened species (Nakonieczny et al. 2007 ; van Swaay et al. 2010 ; Łozowski et...