Distribution and biological peculiarities in Armenia: The species is distributed in Balkans, Asia Minor, Transcaucasia, Iraq, and Iran. Armenia is inhabited by subspecies K.e. eurypilus, which predominantly occupies tragacanth mountain steppes located in Central and Southern Armenia at the elevations between 1200 and 2200 m a.s.l. The host plant of the species is Astracantha denudata. The Eastern Brown Argus gives one generation per year having butterflies on wing from mid June till mid July depending on elevation.
Population dynamics: The species is quite uncommon within typical habitat, however shows stable population trend during 2003-2013 (p>0.05). Most probably the reason of the population's stability is the characters of the species' host-plant, which is thorny bush, not consumable by livestock and therefore not affected by intensive grazing.
Conservation measures: The species is not included in the Global, European, and Armenian Red Lists, as well as in CITES and Bern Conventions. Preliminary assessment of its national conservation status suggests it as Least Concern. At current the species distribution is partly covered by Zangezur Biosphere Complex, Gnishik Protected Landscape, and Khosrov Forest State Reserve, as well as by appropriate Emerald Sites. Also the species is presented in Gudemnis, Gyumorats, Gnisheek, and Ourtsadzor Prime Butterfly Areas. At current there is no necessity for development of special conservation measures, however it is important to continue the monitoring of Eastern Brown Argus, for early determination of population changes.