We exposed the rock cliffs on the Vápeč hill for the critically endangered Apollo butterflies.
In the past, foresters in our country reforested many rocky hills, mainly with stands of black pine. In addition, they have stopped pastures which have become overgrown with shrubs. This is how the Apollo butterfly (Parnassius apollo) lost its habitat in most of its locations of occurrence in Slovakia, thus recording more than 90% decline! in abundance.