Mainly possible and probable breeding records were collected, most of which referred to observations of singing males (often not in full breeding plumage), and - more accidentally - pairs during the breeding season. Nest-building was reported on three occasions, but these breeding attempts all failed. Comparison with older data is rather difficult since observations during the breeding season are treated with more caution nowadays. The population did not exceed 5 bp in 1998-2000, which confirms the species’ status as one of the rarest breeding birds in the country.
- 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.