Scarce swallowtail Republic have been found to be a good indicator of relatively well preserved xerothermic grassland habitats with forest-steppe vegetation, which have no cutting history. In some years the scarce swallowtail is quite abundant. The scarce swallowtail is getting rarer as the blackthorn bushes are being cleared. The butterfly is now protected by law in the Czech Republic, Slovakia, Germany, Hungary, Luxembourg, Russia, Ukraine and Poland. It is considered rare and endangered and protected in some provinces of Austria and of indeterminate status throughout Europe. In Armenia the species demonstrates stable population trend and is evaluated as Least Concern. Though referred
Swallowtail butterfly species inhabit altitudes ranging from sea level to high mountains, as in the case of most species of "Parnassius". The majority of swallowtail species and the greatest diversity are found in the tropics and subtropical regions between 20°N and 20°S, particularly Southeast Asia, and between 20°N and 40°N in East Asia. Only 12 species are found in Europe and only one species, "Papilio machaon" is found in the British Isles. North America has 40 species, including several tropical species and "Parnassius". The northernmost swallowtail is the Siberian Apollo ("Parnassius arcticus"), found in the Arctic Circle in northeastern Yakutia, at altitudes