The slow worm is present in all provinces, except Zeeland. In the province of Flevoland and in the coastal dunes its presence is most probably due to introduction. Core areas are situated in the southern part of the province of Limburg and in the central (Veluwe area in the province of Gelderland and Utrechtse Heuvelrug in the province of Utrecht) and northern (distinct part of the provinces of Friesland and Drenthe) part of the Netherlands.
The slow worm is listed on the Red List as not threatened. It is strictly protected under Dutch legislation and is listed on the Bern Convention (Annex iii). The range of the slow worm has decreased by 20% since 1950. The decrease has been caused by fragmentation, intensification of management of forests, road verges and railway embankments, degradation of heathlands and loss of extensively used small terrains. Careful and small scale management of heathlands and forest edges is important as is management aimed at maintaining or restoring natural forests.
Creemers, R.C.M., Spitzen-van der Sluijs, A.
- Creemers, R.C.M. & J.J.C.W. van Delft 2009. De amfibieën en reptielen van Nederland. Nederlandse Fauna 9. Nationaal Natuurhistorisch Museum Naturalis, KNNV Uitgeverij & European Invertebrate Survey-Nederland, Leiden.