Neptis rivularis (Scopoli, 1763) Hungarian Glider, Schwarzer Trauerfalter, Sylvain des spirees ou Sylvain cenobite, Пеструшка таволговая, Խայտաբղաետ նեփթիս
Distribution and biological peculiarities in Armenia: The species lives in Central and Eastern Europe, Russia, central Asia and the Far East as far as Japan. Armenia is inhabited by subspecies N. r. ludmilla (Nordmann, 1851), which occurs in almost entire country, occupying wide variety of landscapes from about 600 to 2400 m a.s.l. The larval host-plants are various species of Filipendula, Aruncus, and Spiraea. The species gives one generation per annum having butterflies on wing from early May in lower elevations until late July at the higher areas.
Population dynamics: The species can be considered as uncommon within typical habitat, but it demonstrates stable population trend during 2003-2013 (p>0.05). It appears that high level of species adaptability in host-plant selection and naturally low density are the factors, which support the species' tolerance towards disturbance factors.
Conservation measures: The species is not included in the Global and Armenian Red Lists, as well as in CITES and Bern Conventions. The Hungarian Glider, however, is included in the Red Book of European Butterflies as Least concern - that same status that is suggested for the species after preliminary evaluation. The current distribution range of the species lays within number of Protected Areas and Emerald Sites, also the species is presented in all the Prime Butterfly Areas. Thus at current there is no need for specific conservation measures, however continuation of monitoring of the species as part of butterfly species diversity remains important.