The species is observed in a wide range of habitats except for very open farmland. Densities are generally low (less than 10 bp/atlas square) and locally probably underestimated as many pairs will go undetected. Compared to the 1970s, densities have declined in many areas. Especially in larger woodlands on the pleistocene soils in the east of the country, many sites were abandoned due to increased predation by Northern Goshawk (which also affects Magpie and Carrion Crow densities, and hence nest-availability for Long-eared Owls). Elsewhere, lower abundance of voles has deteriorated feeding opportunities. Population in 1998-2000 is estimated at 5000-6000 bp.
- 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.