Lycaena tityrus is a scarce resident. It declined dramatically during the 20th century, disappearing completely from the south of the country. At present, only about a hundred populations remain in the north-east, east and central parts of the Netherlands. The species occurs in a variety of nutrient-poor habitats, such as wet grasslands on peaty soil, marshy areas, heathland and dry, acidic grasslands on sandy soil. It favours sheltered places in the flower-rich transition zones to richer soils; Rumex spp. serve as larval foodplant. It flies in two generations from early May until early September and hibernates as a half-grown caterpillar. It is classified as 'vulnerable' on the 2006 Red List. According to the Dutch Monitoring Scheme, numbers show a moderate decline.
Swaay, C. van, Wynhoff, I., 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.