Breeding is characterized by annual fluctuations and short-distance movements within the breeding season, causing a slightly overestimated distribution pattern. The Delta (194-263 bp in 1998-2000, with concentrations on reclaimed grounds and newly created islands) is clearly of more importance for breeding birds than the Wadden Sea (35-63 bp). Numbers elsewhere are negligible. The steep decline of the national population since 1973-77 (700-900 bp) affected especially the Wadden Sea area, whereas breeding near Lake IJsselmeer (in the 1970s in newly reclaimed polders) has almost disappeared. The population in 1998-2000 is estimated at 270-320 bp.

Bron

Auteur(s)

Meininger, P. L.

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.