Satyrium w-album is an extremely rare resident. Although it had always been rare, in 1977 it suffered dramatically from the outbreak of the Dutch elm disease, as Ulmus spp. serve as larval foodplant. It was even thought to be extinct, but recently two populations have been discovered in the south of the province of Limburg. It is classified as 'critically endangered' on the 2006 Red List. The species flies in one generation from mid-June until mid-August and hibernates as an egg.
Wynhoff, I., Swaay, C. van, Groenendijk, D., Bosveld, M., Bos, F.
- Bos, F., M. Bosveld, D. Groenendijk, C. van Swaay & I. Wynhoff 2006. De dagvlinders van Nederland, verspreiding en bescherming. Nederlandse Fauna 7. De Vlinderstichting, Wageningen en Nationaal Natuurhistorisch Museum Naturalis, European Invertebrate Survey, Nederland.