About 98% of the breeding population is located in the Wadden Sea, with the largest colony at the island of Griend (max. 1250 bp in 1998-2000). In the Delta area, at the southernmost edge of the breeding range, only 40-60 bp were recorded. Much of the differences in distribution, compared to the 1970s, can be attributed to local habitat changes (vegetation succession), although inland breeding has disappeared. Reliable national population figures are only known since the end of the 1970s. These suggest a slight decrease (from 1200-1500 bp in 1978 to 850-1200 around 1990), followed by an increase in the 1990s (1900-2300 bp in 1998-2000).
Bron
Auteur(s)
Lutterop, D., Kasemir, G.
Publicatie
- SOVON Vogelonderzoek Nederland 2002. Atlas van de Nederlandse broedvogels 1998-2000. Nederlandse Fauna 5: 1-584. Nationaal Natuurhistorisch Museum Naturalis, KNNV Uitgeverij & European Invertebrate Survey-Nederland, Leiden.