Distribution and biological peculiarities in Armenia: The species is distributed in most of Europe, and also in North Africa, Anatolia, Caucasus, and Transcaucasia. Armenia is inhabited by subspecies F. q. longicaudatus (Riley, 1921). Host plants are various species of oak: Quercus robur, Q. marchanthera, etc. In Armenia the species mostly inhabits Northern, North-eastern and South-eastern regions, where most of the forests are presented, but also occurs in Central parts of the country, where only residual forests can be found. Elevation range occupied by the species varies from about 800 to 2200 m a.s.l. Flight period in Armenia lasts from mid July (sometimes even early July) to early September in single generation.
Population dynamics: The species is relatively uncommon within a typical habitat; however here it is important to remember that Purple hairstreak is mostly canopy species. Nevertheless sometimes it moves down to the forest glades and clearings, or goes higher in the meadows above timberline to feed on flowers. Population trend of the species in general appears to be relatively stable, although the species increases in the areas of selective cutting, where created open spaces provide additional opportunities for flowers to grow, and decreases in the areas of clear cutting.
Conservation measures: The species has not been evaluated for IUCN Red List and for Red Book of Animals of Armenia, however it was included in the European Red List of Butterflies (2010) as Least Concern. Also the species is not included in CITES due to lack of trade interest, and is not included in the Appendices of Bern Convention. Some populations of the species are protected in the National Parks of Armenia, in Zangezur Biosphere Complex, being included in in PBAs Lichk, Gudemnis, Gyumorats. However majority of the population is located in the forests of industrial use, and therefore are vulnerable to insufficient logging practices. Therefore, the first step is assessment of its conservation status at the National level, and then - careful selection of the logging method and accompanying monitoring of forest butterflies can support in sustainability of the whole community of forest specialists and serve as early warning system of habitat degradation.