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Satyrium w-album (Knoch, 1782)
Range: Europe, W Asia.
Distribution in Bulgaria: Widespread, but rarely numerous from sea level to ca. 1600 m.
Habitat: Bushy places at forest margins.
Bionomics: One generation from May till July. Larval host-plant: Ulmus (Ulmaceae) (Tolman & Lewington 1997).
Conservation status: In Bulgaria widespread but vulnerable due to its monophagy on elms, which are susceptible to Dutch Elm Disease. Research on the population dynamics of this species is desirable. IUCN category: Data Deficient.